0-100: The FSM exists in the void. After his whole family is destroyed (or is it??) in the Dragon-Oni wars of the First Realm, the FSM brought himself and the Golden Armour to the realm of Ninjago, which is currently a void of nothingness.
100-200: The FSM has the idea to create a world. A perfect world, unlike the one he came from. He uses the Golden Armour to create this perfect world, he spends a long time getting it ready.
200-300: The world is done. The FSM creates three different peoples: the Sky People, the Sea People, and the Snake people.
300-400: Time passes, and the FSM finds that he is lonely. Despite his people living in perfect harmony, he finds himself yearning for more. He uses the Golden Armour to create for himself a partner (Wu and Garm's mom, possibly the First Ninja Master). He turns the Golden Armour into the four golden weapons, each representing the four most powerful elements (fire, earth, lighting and ice).
400-500: The FSM and his wife have their first son, who is named Garmadon.
500-600: They have their second kid, Wu.
600-1100: Nothing happens. The kids are actually only 7 and 6 cause they age super slow.
1100-1200: Garm and Wu find the golden weapons and accidentally create humans :) The FSM isn't that mad.
1200-2000: Humans start waging war against each other and the FSM is like, nah this ain't happening and splits the continent into 5 pieces. He gives 4 people powers (fire, ice, earth, lightning) and they become rulers chosen by god or whatever. The 5th island is where the Snake People live. The Sky people choose to go live in the Earth Kingdom because they want to marry humans. Some humans develop elemental powers on their own.
2000-2100: Garm goes through his edgy teenage years and gives up his super slow aging as an act of rebellion because his parents won't let him marry the pretty human girl Misako. Wu does the same because he wants to be like his big bro. Misako and Garm elope and don't come back until Misako is 6 months pregnant with their kid. Misako is now immortal because she's having an immortal kid.
2100-2200: Time gets a name and humans create the calendar and start keeping track of the years so we're back to year 1 lol.
Nya nearly stumbled down the stairs leading to the forge. It was so dark, how did Kai see where he was going? As she descended on the last step, a rush of sensation hit her in the face. Hot air blew her hair around her face, and a rhythmic bang, bang, bang made her want to cover her ears. How did Kai stand it down here?
She saw him in the far corner of the forge, bent over whatever he was working on. Sweat ran down the side of his face, and the orange-red glow of the fires made the scar on his right eye stand out. She approached him.
"Kai?" she asked tentatively. He wasn't always in a good mood when he came down here. When he glanced at her she could tell he was in a foul one today.
"What?" he replied sharply. Nya picked up the sword he had been working on. It was a spiral, like turtle nests in the sand. She chuckled.
"Looks like you were too hasty again." Kai's expression softened into a small smile.
"You're probably right." He wiped his hands on a cloth that was just as sooty as they were, doing next to nothing to remove the grime of the forge. "What did you want?"
"I just wanted to let you know that I'm leaving for the Diplomat's Meeting in the Isles," she explained, "And there's an old man up in the courtyard who wants to speak with you. Krux keeps giving him the evil eye."
"I'll go talk to him," he put the bent sword away and started heading towards the stairs, "Let's go, sis."
.*.*.*.
Ramblings below the cut.
This will probably be part of the first chapter of a fic if I decide to turn the au into one. It will need a lot more world developing if that's going to happen. I decided that Krux would be a kind of constant in Kai and Nya's lives, him being the Shogun and them being the Emperor/Prince and Princess. I mostly wrote this because I wanted to try to get back into the swing of writing after taking a 6 month long break to try to recharge my creativity battery.