There were two scrapped historical moments.one was from Kaia's ancestors and other from Dead-eye's pay yet these two stories can remain as uncanon

"Long before time had a name Isabella the first master of silver was fighting with ninjago most confusing but very evil villian
Named Dead-eye.his eyes glowed red as blood.his hoodie is attached with devil horns,some even believed Dead-eye was devil himself and he has many powers no one can count.in finnal battle with Isabella and Dead-eye,dead eye said....you want distraction?one thought from me and you're city will BURN.it is stone...melted out. I will smile you're people won't.as Isabella looks what Dead-eye said he had a plan.she took out realm crystal and taked Dead-eye to spirit world.the realm what looks most beautiful in outside but dangerous inside and will turn everyone stone who isn't from that realm.and dead eye looks at Isabella and says.you fool you put us in most dangerous realm.and Isabella says.no just you.and she used her abilitys to chain him up  and devil-eye turned into permanent stone but Isabella weren't so lucky.she saw she also slowly turning into stone.so he sent her powers and realm crystal back to ninjago hoping it one day will find it's rightful Owner"

Young kaia:is it all true mom?

And mom answers: everything can be true if you think so..

Kaia was looking at Younger her and her mother and says

"Wow...i remberer that day like it was yesterday..just chill winter night while mother telling me a story.i never knew the one who the power chooses is me.i gotta be lucky one.if my mother still would be alive she would be proud of me"

-------

"I never wanted to be the villian but he had to make me one"

Sayd Dead-Eye pointing at picture of first spinjitzu master

"Long before time had a name Spirit realm was my realm.we didn't know about Ninjago until he arrived.he sayd we were danger to ninjago.i did not know what he meant because him and i came from different realm.but he also sayd our realm disturbs Ninjago.i tried to convince his wrong but he didn't listen.he cursed my realm.with that spirit realm became a realm with forever night what turns people stone.i had to see my whole realm fall apart just to see everything i love turn into stones.my kids,my wife,my siblings.and most importantly,
My people,when i was last one to turn into stones i promised myself that if he curses my realm why shouldn't i curse his?
You ninja's would never understand"