Hello :∆ am Cael n I don't know shit abt Tumblr. Genderfluid He/She/They/It || My prompts are F2U :D!! (Tag me because I wanna read them and I'm shameless like that)
Heyya! I was wondering if u would allow me to create a fanfic of your unhinged deadserious story idea where Danny is a scientist in the league. And if yes, how old was Danny and Damien when Danny was a scientist and Damian was trying to court him. And how old will they be when Danny goes to Gotham U?
Oh yeah, totally! My prompts are all f2u as long as you tag me (I wanna read it too :[)
Being bored within the walls of the league, you are raised to serve the Al-Ghuls; without hesitation, without defiance. It fascinates him how the human mind works; littered with blind devotion to people you know you should not serve, under the morals you should not have.
Does he knows that it is wrong? Yes.
Will he do something about it? No.
Why? Because the Al-Ghul bloodline fascinates him all the same.
He is, however, more interested in the toxic green waters of the Lazarus; how it bewitches and boils— how it kills and heals.
However, such thoughts are to be locked within the curious expanses of his mind.
'If you want to continue living, dear child, do not become entranced by the temptation of immortal life.'
That woman once told him; the same woman who raised him, and who died a cowardly death.
He was six when he is caught Redhanded experimenting with the Lazarus water. He was six when he is almost tortured and beheaded, if it weren't for his already existing research.
He was seven when he trailed after master Raa to stabilize the Lazarus water in his body. Seven when he took a peek of the young master training with the capabilities most of the league currently have. Seven when they met eyes.
Seven when he decides, young master Damian is beautiful.
Danny's existence is a big "fuck you" To the people who doesn't believe in the afterlife. I'd imagine it be funny whenever he gets caught in like. Someone's personal blog or a news anchor trying to interview him and everytime he finishes he adds; "remember to stay safe, kids! If you die a stupid death I'll make sure to not let your spirit move on <3"
Some people find this amusing while others take it seriously.
To bribe a stray cat (AKA the brother you lost contact with)
Danny and Damian siblings au where they're not necessarily twins, and ultimately got seperated for whatever reason. Danny gets outed as a Half a and flees to Gotham and ultimately decides to just. Haunt Damian. He insists that he just doesn't know what to do anymore. He lied, he just felt pulled to Damian and Bruce.
Fast forward to some mission gone wrong and either of them gets into a position where they're just a single blow away from death and then suddenly said blow is deflected by a spirit-looking Danny.
Damian is, of course, shocked by the fact that his supposedly dead (?) Brother becoming some sort of guardian for his family, except; Danny immediately disappears the moment they hold eye contact.
Every. Single. Time.
Cue: them starting to try and lure Danny out with anything space related/food/anything in between. If Danny is being stubborn they will simply put themselves in immediate danger.
The Justice League Dark caught wind of a cult trying to summon the Ghost King. A being with power so terrible and great, that all of the chaotic Infinite Realms feared him. A true tyrant. Long ago it took the effort of ghosts equal to gods to seal him away into a permeant slumber.
And now this cult wishes to wake him and bring him to the living realm. It was a race against the clock to find the ritual site and all members were called on board, magic or not. Even Constantine looked stressed.
They did find the site.
But it was too late, the ritual was completed. The entire inner circle of runes glowed before being swallowed in a column of green light. The air filled with static and a ringing that made Supergirl crumble to the ground.
The light dissipated, but there was no great figure or being of pure evil. Instead there was a boy, a teenager. He laid on the ground curled up in his sleep. He was a ghost no doubt, dressed in regal clothing.
Despite this when he stirred, everyone froze. It seemed the cold hard ground woke him up. He got up slowly and yawned, revealing his sharp fangs. Once sat up he opened his bleary eyes to look around. He looked confused and tired, really tired.
"Where am I?" He mumbled. "I was trying to get some sleep." Constantine internally screaming, latches onto that last sentence. He glances over to Batman. He caught that last part too. Batman approaches calmly and crouches down in front of the boy king. Hardening his resolve, Batman takes on a gentle tone.
"Hey kiddo, sorry we woke you. Lets get you back to bed yeah?" The boy nodded in agreement. He pulled himself to his feet before looking around in a circle. "Where did my blanket go?" He asked rather sadly. Batman is quick to shed his own cape and drape it over him. "You can borrow my cape until we get you a new one." He nodded again, pulling the black fabric around himself.
John quickly summoned a portal door, while Batman led the King through it. John threw looks around at everyone. Everyone could tell he was mouthing the words. 'Find me a fucking blanket now'
Running on the logic of getting the king away from Earth, away from graves and the undead, that could give him power. The portal led to the Watch Tower.
Batman took advantage of the King's bleary state to send a base wide alert for all noncritical members to evacuate immediately. With a priority that death adjacent members leave first. "The stars are pretty." Bruce looked at the boy staring out the window in wonder. He almost looked like a normal kid, almost.
"Yeah they are, it's pretty late so we should get you back to bed." He nodded, going along with Batman's gentle coaxing.
He takes the boy to an unused bedroom. Making sure the room isn't dusty and that lights are dimmed. He glances back to see about a dozen different leaguers all holding blankets, one thought to bring extra pillows. The bed was pretty barren with only a single pillow and a thin bedsheet. So Bruce took a thick duvet, one of the fluffier blankets and a second pillow from his team before shooing them away.
The boy ended up keeping his cape, mumbling how it was warm. He tucked the boy in, before quietly exiting the room and turning off the light. He was pretty sure the King fell back to sleep before he even reached the light switch.
After the door shut, he made direct eye contact with John. "Constantine." They needed to figure out what the hell was going on.
To bribe a stray cat (AKA the brother you lost contact with)
Danny and Damian siblings au where they're not necessarily twins, and ultimately got seperated for whatever reason. Danny gets outed as a Half a and flees to Gotham and ultimately decides to just. Haunt Damian. He insists that he just doesn't know what to do anymore. He lied, he just felt pulled to Damian and Bruce.
Fast forward to some mission gone wrong and either of them gets into a position where they're just a single blow away from death and then suddenly said blow is deflected by a spirit-looking Danny.
Damian is, of course, shocked by the fact that his supposedly dead (?) Brother becoming some sort of guardian for his family, except; Danny immediately disappears the moment they hold eye contact.
Every. Single. Time.
Cue: them starting to try and lure Danny out with anything space related/food/anything in between. If Danny is being stubborn they will simply put themselves in immediate danger.
He’s dealt with a lot of creepy things as Phantom, is a creepy thing himself in fact, but everything he’s faced so far has at least been… somewhat humanoid, or familiar, in form. He could always recognize some kind of a face, a chest or other ‘main body’, and limbs.
Ghost powers, with their alarming variety and blatant defiance of basic physics, made it anything but a clean science but Danny always knew at minimum the basics of how to fight them. Avoid the limbs, aim for the main body, watch the face for clues like eye movement. And ghosts aren’t exactly known for being physical either, even if Danny’s own abilities and Fenton-tech make that particular quirk of the species obsolete…but the Thing hovering in the hallway by the police?
The large, ethereal mass of floating spectral wings and blurry eyes bound by nothing but sourceless light? There is no face, no limbs, no body at all, it just is. And yet, it also just isn’t, the very dimensional fabric making up Casper High distorting around it into something equally unrecognizable. It shifts in and out of focus, filling the space with colours Danny has never seen and an unsettling echo of senseless voices at frequencies he didn’t know he could register.
The cold leaching the strength from Danny’s limbs has nothing to do with his ghost-sense or Core Affinity, but rather everything to do with Fear.
How is he supposed to fight that…?
Distantly, he can feel Sam jam her elbow into his side and hear Tucker talking to one of the cops—when did he get so close? Are they a ‘he’? A ‘she’? Danny shouldn’t assume, right?
Danny can’t take his eyes off the…Mass… to check, but then the cop is gazing into his eyes, crouched between Danny and the thing and Danny can no longer see It. Danny swallows, the world gradually re-twisting itself into something more manageable around him. The cop speaks slowly, gently, asking if he can touch Danny.
Danny nods, syrupy thoughts still stuck trying to comprehend what’s happening. The Thing stays in his mind, its hooks in buried deep and dragging his focus away from reality even as a mere memory. As a result, Danny doesn’t think of what might happen if the cop were to touch his cold hands, stiff with nails turning blue, and notice there’s no pulse before giving his consent. Danny’s heart, instinctively shut down at first sight of the Mass, has yet to start up again. Danny can’t help but wonder, with a morbid curiosity, if it stopped to keep itself from bursting—
The cop, thankfully, instead sets a heavy hand on Danny’s shoulder, thumb moving in steady circles. It’s grounding, physical in a way that Thing could never be.
“….with me buddy?”
“Hmm, hmm.”
“Good, you’re doing good.”
Danny blinks, his eyes suddenly feeling very dry. He had stopped blinking all together, and his chest is so still he must’ve not been breathing either.
The cop must assume his breathing is just unnoticeable under Danny’s baggy shirt, because he—for now Danny can register that they are a he—continues talking slowly and calmly to what Danny knows could be effectively classified as a corpse. Danny’s corpse.
“I’m sorry you had to see this, no kid should ever…” the cop trails off, his long hair falling into his face as he shakes his head before continuing. “I promise you that my partners and I will do everything we can to stop this from happening again—“
“Partners?” Danny immediately latches onto the plurality, remembering how there were only two humans and the Mass beyond the caution tape when he rounded the corner. “You’re partners with it?!”
Oh good, he’s breathing again.
Oh crap, he is breathing way too fast.
“It?” The cop frowns, but doesn’t react to Danny’s now very prominent panic, clearly caught off guard.
“You know something, kiddo?” A new voice interrupts, gruff and ragged, but in a way that sounds false. A tone built from habit, not natural development.
If Danny were feeling better he might point that out, make some fun of the new cop trying to sound tough next to his far taller partner, but as it is Danny just wants to run. Unfortunately for Danny, his feet refuse to budge, and without going ghost, his tail is of no use either.
Raising a shaky hand, because of course those can still move, he points behind the first cop to where the Mass once hovered, his finger brushing the right side of the guy’s police uniform. Danny doesn’t move to see around the guy and check if It’s still there.
Please be gone, please be gone, please be gone—
Both cops are frowning now, and they exchange a meaningful glance before looking back down the hall. As the crouching cop does so, his body twisting to look, Danny catches another glimpse of the still-there Thing. Including a nearly luminescence-obscured flap of beige fabric he didn’t see the first time.
“Why…is it in a trench coat?” Danny says faintly, the surreality of seeing such a mundane item amongst It nearly sending him into shock.
Or is he already in shock…?
But then the creature turns away from the viscera on the floor—or at least, Danny assumes it turned away, because he still can’t wrap his mind around it. He still can’t locate anything resembling a face, or any other comprehensible features in the borderline-impossible shapes it consists of, that could indicate movement. What Danny can understand though, is that he feels, carved deep inside his soul, the very moment it sees him.
“Are you talking about Cas—?”
Danny is gone before gruff cop can finish speaking, a friend in each hand as he drags them through the floor in broad daylight, right in front of two cops that could very much hand him over to the GIW and a monster that might not even be escapable in the first place.
His friends yell at him, scared by his behaviour, but they don’t fight his grip and that’s all he needs to know. They trust him to protect them, and protect them he will.
A Demon's twin au where Danny and Damian are polar opposites of each other as usual. Damian is the serious and pokey one while Danny is the laid back, carefree twin. Except, Danny is 10x more psychotic than Dami, and his demeanor is somewhat a manipulation tactic. He's still loves Dami vv much and would gladly burn the world for him while Dami is....hm. He envies Danny but in the same time very intimidated by him (read: black cat & golden retriever situation)
One day he gets killed by Damian (may it be a duel that he didn't think seriously because he thought Dami would never kill him or Dami just flat out conspiring against him is your choice) and Danny was FURIOUS at him. Instead, he swore Damian would pay the price for betraying him.
Fast forward after he got resurrected and lived as Danny, he's soften up a bit; more talking and less stabbing, basically. One thing leads to another where he leaves and ends up in Gotham (preferably because of CW) and hey, what dya know. Dami's siblings aren't that bad...
Meanwhile Batfam™ are scrambling because there's a teenager that looks like Damian wandering over Gotham. Damian is perplexed because that could be his supposedly dead brother (eye color).
Everything went wrong when Danny straight up jumped at Damian in costume, trying to kill him.
Talia sat back and watched as her sons fought; Danyal's boisterous laughter filled the air in sharp cackles, his grin bright and carefree as he parried Damian's attacks.
Unlike Danyal, Damian was silent, his face hardened into a scowl. something had happened between now and breakfast, something Talia hadn't witnessed. She could tell that Danyal's laughter was angering her other son, but she couldn't figure out why.
Usually, Damian was calm and patient enough to ignore his brother's eccentric behavior. He could handle laughter and teasing like water down his back; unless Danyal had done something to anger him beforehand, but that was not what happened today.
Danyal had been by her side all morning, learning everything Talia would teach him about her duties. He was excited to learn everything he could so he could support his brother, he had even sat down and helped her sign documents. Anything to be the best right hand of the demon he had said.
He was fully prepared to take her position as soon as Damian became the demon head, he was prepared to spend the rest of his life following his lead. He was loyal to a fault; if his brother asked him to do something, he would. (Talia had made sure to hammer it into his head to always think through his orders, but she knew he had unending trust in his twin. If Damian asked him to kill someone, he would because he believes Damian would have a good reason.)
Danyal laughed again as he disarmed Damian, his twin's sword dropping to the ground with a sharp metallic thunk. knowing he had won, he raised his sword and pointed it at Damian's chest before his twin could pull out his hidden knives. And just like that, Danyal won.
he waited the required time before pulling back and resheathing his sword, letting the scabbard hit his leg as he turned and started making his way over to her.
talia pushed off the wall and started moving closer, a small smile on her face. Her boys were formidable opponents, only matched by each other. she was sure they would beat her and Ra's soon enough.
Danyal stopped infront of her, a bright smile still on his face. "I won, mother. Do you know what that means?" he asked, his voice breaking from the whisper he had started with.
"it means you're in the lead, again," Talia replied with a smile, running her hand through his black hair. She wasn't sure exactly who he got his hair from, whether it be Bruce or her, but she knew neither of them had hair as dark as his. It reminded her of the night sky, with how it almost absorbed the light around him.
she knew Damian had her hair, the dark brown almost black was a dead giveaway, and so was the slight curl he got if he allowed his to grow. he got her hair, just like he got her eyes. The deep emerald green stood out against their golden skin. Danyal got his eyes from Bruce's side of the family. If she had to guess, they were from Martha. Bruce's was a more gray-blue, like a stormy sea and sky.
Danyal's was a bright crystal blue, a strikingly bright blue that you couldn't help but notice and admire. Just like his grandmother's portrait, Bruce had shown her so long ago.
"I'm a point ahead of Dami, mother!" danyal cheered, his excitement almost infectious. "yes, Habibi." Talia agreed, brushing the rest of his hair behind his ear. "but just like last month, your brother will get ahead of you and this cycle will repeat until your last breaths."
"I know!" Danyal grinned, "I can't wait to see it happen."
Talia shook her head fondly, she loved her boys. "put your sword away, Danyal. we have much to do now."
"yes, mother." Danyal agreed, bowing at her order and turning to complete it.
turning away from her sons, talia marched out the door, and waited.
and waited.
and waited.
until a loud cry shattered the silence. It was not a cry of pain, or fear, but anger. Anger she had never heard before. hundreds of scenarios rushed through her head; someone broke in and killed one of them, they had been infiltrated and her sons had been hurt. Anything and everything that could have possibly occurred roared in her head as she sprinted back to the room. Throwing the door open, she stopped, her feet rooting to the ground as her eyes took in the scene before her.
Damian loomed over Danyal with a snarl, his sword skewered right through Danyal's chest, blood already soaking into his shirt. Danyal was kneeling, his hands wrapped around the blade, and his face set into something so angry and hurt.
and standing there, in the shadows without a care in the world was ra's. his face set into a neutral frown as he looked upon his grandsons.
forcing her feet to move, Talia rushed over to her boys and wrapped her arms around Damian. his body shook, whether from anger or shock, she did not care. Easily, he let go of the sword and allowed her to pull him away.
"Habibi, what did you do?" she whispered, trying to quickly move him to the other side of the room. They both watched as Danyal fell back, his legs giving out on him. He stared down at his chest, his hands still wrapped around the sword. he did not cry or scream, he just sat and stared at it, his face smoothing out into a neutral frown.
"Damian," Talia hissed, releasing her son so she could crouch in front of him. She needed to know; was he ordered to kill him? was it an accident? did he do it on purpose? She couldn't do anything for Danyal yet, the wound would be fatal. There was no survival, not unless she was allowed to use the pits. and that's why she needed to know.
"What did you do?" she repeated, looking up into his green eyes as she held onto his arms.
"I-" Damian opened his mouth, his eyes focusing on her instead of his brother. "I wanted to kill him." he finally whispered, his gaze moving to the ground. but it wasn't in remorse or confusion, that Talia could tell.
slowly letting him go, Talia nodded her head. She knew what she needed to do now. "go to your room, Damian." Talia demanded, standing up and making her way over to Danyal.
Her son grunted in agreement, sounding so much like his father it squeezed Talia's heart. To sound like him in such a moment was unnerving, unnatural.
Danyal didn't move to look at her as she approached, he kept his head down and continued to loosely hold the sword, his blood still soaking into his clothes. sitting down, Talia cupped her hands around Danyal's face and slowly lifted his head. His eyes were focused as he gazed back at her, his bright blue eyes a sharp icy blade.
she spoke no words, but Danyal seemed to know what she meant as he allowed himself to lean into her hold. Moving one of her hands, Talia removed the blade and held her son close. he rested his head against her neck and closed his eyes.
leaning down Talia kissed his head, "do not worry child, mother will fix this." she whispered.
she got no response, just the slowing of his breath and his body relaxing into hers. looking up, Talia stared at her father.
Ra's stared back at her, his eyes revealing nothing as he watched Danyal take his last breath. With a nod, he turned and left the room. leaving Talia holding her son's dead body and permission to do what she needed.
Wrapping her arms around Danyal, Talia stood up and made her way out of the room. She didn't glance back as the door slammed closed behind her, the haunting echoes of her youngest's laughter fading away never to be heard in these cursed halls again.
~
Damian remembered that day; it was as clear as if it had just happened. He remembered how his arms shook and his anger quickly flooded out of his body at the sight of his sword running through his twin's body.
he remembered the look on his baby brother's face as Mother pulled him away, leaving Danyal to hold the sword so it could not cause him more harm. He remembered Mother asking him what he had done, her eyes panicked and scared as she glanced at Grandfather.
he remembered telling her he had wanted to do it, that he hadn't been ordered to.
he remembered how it took two hours for his mind to catch up to what he had done, two hours for him to realize he had just killed his brother. It took another two days to realize his brother was never coming back, that the pits had not worked.
Damian stared at the camera footage infront of him, his family's voices buzzing with theories and analyzing everything they could.
He remembered his brother's bright carefree smile just minutes before Damian had killed him.
A Demon's twin au where Danny and Damian are polar opposites of each other as usual. Damian is the serious and pokey one while Danny is the laid back, carefree twin. Except, Danny is 10x more psychotic than Dami, and his demeanor is somewhat a manipulation tactic. He's still loves Dami vv much and would gladly burn the world for him while Dami is....hm. He envies Danny but in the same time very intimidated by him (read: black cat & golden retriever situation)
One day he gets killed by Damian (may it be a duel that he didn't think seriously because he thought Dami would never kill him or Dami just flat out conspiring against him is your choice) and Danny was FURIOUS at him. Instead, he swore Damian would pay the price for betraying him.
Fast forward after he got resurrected and lived as Danny, he's soften up a bit; more talking and less stabbing, basically. One thing leads to another where he leaves and ends up in Gotham (preferably because of CW) and hey, what dya know. Dami's siblings aren't that bad...
Meanwhile Batfam™ are scrambling because there's a teenager that looks like Damian wandering over Gotham. Damian is perplexed because that could be his supposedly dead brother (eye color).
Everything went wrong when Danny straight up jumped at Damian in costume, trying to kill him.
It definitely won't help that Danny reverted to the LoA's language to vent his ire at Damian. Also, Damian is confused, Danny hasn't even stabbed him properly yet. What is his twin playing at?!? Why is he drawing this out? His twin was never so.... Slow about his work before?
Danny meanwhile wants to draw this out. Properly vent all the feelings he has towards the situation. Grandfather hadn't even ordered them to fight to the death! Ever! It had never even been implied! Damian just decided to kill him one day! Danny knows they were never as close as siblings should be! But he would never have killed Damian without being ordered to!! Mother would have been most upset! Shown by how she quickly packed him off to live elsewhere. To ensure the two of them didn't keep killing each other!!
So the Bats? See the kids they've been stalking as a possible clone just go ape shit. Hear everything he screaming at Damian. See how the wounds he is inflicting aren't fatal and scramble to intervene. They aren't sure how long he's gonna stay none fatal. If he will even. Oh, oh shit, secret twin. Damian what the fuck. It's been so long and you still haven't told us about this? Bruce is gonna be unbearable. Hey feral brother we didn't know about. Please put down the knife?
A Demon's twin au where Danny and Damian are polar opposites of each other as usual. Damian is the serious and pokey one while Danny is the laid back, carefree twin. Except, Danny is 10x more psychotic than Dami, and his demeanor is somewhat a manipulation tactic. He's still loves Dami vv much and would gladly burn the world for him while Dami is....hm. He envies Danny but in the same time very intimidated by him (read: black cat & golden retriever situation)
One day he gets killed by Damian (may it be a duel that he didn't think seriously because he thought Dami would never kill him or Dami just flat out conspiring against him is your choice) and Danny was FURIOUS at him. Instead, he swore Damian would pay the price for betraying him.
Fast forward after he got resurrected and lived as Danny, he's soften up a bit; more talking and less stabbing, basically. One thing leads to another where he leaves and ends up in Gotham (preferably because of CW) and hey, what dya know. Dami's siblings aren't that bad...
Meanwhile Batfam™ are scrambling because there's a teenager that looks like Damian wandering over Gotham. Damian is perplexed because that could be his supposedly dead brother (eye color).
Everything went wrong when Danny straight up jumped at Damian in costume, trying to kill him.
Earth, now in danger after the infinite realms waged war against them, is on a time limit to reverse it. The shadows speak of a person; the only person who can change the fate of the whole planet. So the Justice League scramble to find this person, only for it to be revealed as Daniel Fenton-Wayne, the newest adoptee of Bruce Wayne.
The same person who made headlines in Gotham media for his mid-western charm, looked at them blankly and told them good luck.
The sun, the center of the solar system...is about to go Supernova.
And there's nothing the Justice League can do to stop it.
As far as they can tell, it's magic. The magic probably relates to something Darkseid had said the last time they fought him, something about having more than one method of victory.
They don't have time to dive into it.
The Lantern Corps are going from planet to planet, pleading for anyone to accept Earth Refuges. The Justice League is working with all World Governments to make sure that people are ready for planetary evacuation.
The sun grows brighter. And hotter. And bigger.
Planets start to veer a little off course. The Earth's moon comes far close to the planet than it's supposed to.
Tsunamis are starting to happen instead of high tide. Earthquakes are becoming a norm. The increased mass and heat is ruining the delicate balance their system has, and if the Lantern Corps doesn't find a place soon, then they'll have to send everyone they can in random directions, and just hope they survive.
Then, on the morning where it's do or die, where whether or not the Lantern Corps found a place humanity would have to leave regardless, the sun...turns off.
Then it comes back on.
It looks normal.
The readings come back normal.
The planets, which had started to be pulled off course, are back in their original positions. The moon is just as far away as it's always been. In fact, the dates on their computers all read three days earlier.
Like they'd been thrown back in time.
As one, Earth realizes that it must have been the Flash that saved them. After all, that's the hero that can and will go through time if needed!
Flash is hailed as a hero, but...he didn't do this?
He asks his family.
None of them did this.
In Illinois, Danny rushes out of his parent's basement...and sees that it worked. Clockwork held up his end of the deal.
Time has been reversed by a few days, from before the moon was dragged closer. The replacement sun is functioning just fine.
As a baby Ancient, one that wasn't even fully dead yet, he'd been worried that he'd fucked it up. But no, the new sun he grew looks like it's doing fusion perfectly normally, happily chugging away in the sky.
Everything will be okay.
Now, Danny has to uphold his end of the deal.
Everything has a price. The Infinite Realms lost out on a lot of souls from what Danny just did, after all. It's only fair he offer something in return.
He has to move into the Infinite Realms, permanently, and accept his apparently earned title of High King.
The last thing he's allowed to do on Earth is to give his summoning sigil to a man named John Constantine, along with a note from Clockwork.
Or; Earth was super doomed, no way out, and Clockwork hated that. So he broke the rules. He accepted a deal with Danny, helped him make a new sun, spun time backwards, and had Danny sign a contract saying the boy would give up his life in the mortal world once it was done.
That way, at least as far as the Observants are concerned, an equal price is being paid.
Then, he sent the boy to Constantine.
He told Danny it's because he wants the man to have his summoning sigil.
It's actually because if anyone can bamboozle and loophole Danny out of this contract, it's John Fucking Constantine, and the note he told Danny to give him is asking the man to do just that.
DP x DC, except Batfam are all reincarnations of Danny's friends from a different era, Danny is an actual ancient, and his canon life was from a few decades prior. He was the one who cursed them to know each other in every lifetime (may it be for good or bad) and was imprisoned with Pariah for tempering with fate.