In all honesty this started because of 2 ting :
1) wanting to make platinum dragon lord experience a sexuality crisis and making him suffer
2) letting Ainz's hoarding habits become stronger
It all started when Ainz Ooal Gown was still active
While Momonga , Tabula and a few other members were clearing a never before seen dungeon (not Nazarick) they stumbled upon
When the finally finished it and got the loot
In the loot was a World Item , however they didn't know this at the time
And by being the person to touch the item Momonga got bound to it
The World Item is called "Ring Of The Verechelen"(this connection to Slavic myths was not intentional) and it effectively grants the user the ability to transform into a dragon and a dragonoid forms (the dragonoid form is more similar to a lizardman that of human)
Of course the forms themselves have all the negative effects associated with them . Of course someone who already plays with either dragon or dragonoid they will get buffet
Of course the chances of that happening are extremely low as most heteromorph are pk so constantly they can even get to level 80 most of the time for longer than a day or two unless they are in a guild . And while dragonoids can have a more humanoid apprance they still get the negative of being in a weaker form , and anyone who plays a dragon after about level 30 is constantly on the run from being pk-ed because of how big they are (you saw the dragon form of Momo above ? Yeah that's a level 100 dragon , they get massive quick , at level 30 they get around the same size as an elephant)
Anyoway back to the World Item
Of course players would still have to build and find the right equipment for both of the forms , and they would also need to level up both forms simultaneously
So a real brother to most peole
Not to Ainz Ooal Gown though
Of course they would still need to learn which classes to get ainz and how he should evolve
Which means they got Tabula and the rest of the guild on the mission to try and find Momo a dragon race to try and build that compliments his already existing build
Which is and how they stumbled on the Zmey build (this connection to Slavic myths was intentional) more specifically on the thr black Zmey or a Gorynych Zmey . The Zmey build focuses much more on the magic side of ting rather than sheer physical buffs
So now Momonga has a black dragon form with as many heads as he has access to the highest tier magic of a element , so at the moment 3
He also can't get the ring off , it didn't work . But at least he doesn't have to worry about someone stealing it as it got linked to his account (like the red or that he still has)
Also Tabula actually liked the horn on the main head so much that when making Albedo he indulged and gave her the same horns as Momo
Anyway time continues and we get to the start of the story
A lot of things go somewhat to canon . Of course there are differences , like the fact that he can in fact eat and sleep (it helps to relax because of all the stress that Nazarick puts him under ) and also having the emotional suppression ting weakened while in dragon mode
Of course things still bleed over from the forms
Like make Momo even more of a collector that canon
Of course he is also a lot more willing to indulge his hoard in whatever they desire
Momo doesn't hoard gold , previous metals , artifacts , World Items or such meaningless junk . What he hoards is people
And the denizens of Nazarick and more specifically the NPCs created by his fellow players are the crown jewels of his hoard . With Momo being willing to give everything else he has to have them be his . Which considering the NPCs unwavering loyalty means he is almost constantly on a HordingHigh™ and also running a lot on dragon instincts because of his actually (already) rather compatible mind set and hoarding habits
Shalltear's brainwashing really really angry and the moment he learns who is to blame the whole country will be going down is flames
The Lizardmen arc did go relatively smoothly . Especially after Ainz learned that Cocytus was interested in "hoarding" a few of the lizardmen , and the warriors at that ! Cocytus did still have to kill them to show dominance but all the chefs were revived because they do have the potential to also catch Cocytus's eye . And Ainz is more than happy to indulge his children
The same goes for the Tuare situation . The moment Ainz was sure that Sebas wasn't being mind controlled it was easy to piece out that he must be starting his own hoard , with the reason why he was so protective of Tuare specifically being because not only had she already been deeply hurt to the point of almost breaking but she is the weakest (or the least protected) out of his hoard . After that when she started to work at Nazarick she was largely regarded like a summoned monster aka absolutely loyal to their summoner (Sebas) and by extension Lord Ainz as the supreme being he is , so she got treated relatively well (especially in comparison If it were any other human) while she was part time a maid and part time helping in the kitchen her coworkers in both having quickly become fond of her (it is like a child trying to imitate an adult from their perspective)
Overall Ainz being more like a dragon rather that a lich makes only small differences
Like rather than having Gazef killed he instead got kidnapped (Jirchiv is questioning if he is next on the kidnapping order)
And msimilar shinanagans happening
Until platinum dragon lord meets Ainz in the bone(flesh ? Scales?) for the first time . And immediately understands 2 things . That being:
1) he threatened the hoard of a brooding parent aka when the parent is the most likely to go straight for the kill on any neasances let alone something that threatened their child
Because platinum is having a sexuality crisis because the only dragon that has ever caught his interest just had to be an YGRASILL player . And a hot angry YGRASILL player who has directed his ire at him (would it be strange for him to say he finds that hot ?) . He kinda wanna gets choked to death by those hands or fucked out of consciousness while again getting checked (aperantaly he has a choking kink)