(I'm rewriting Ninjago here's the concept of death)
Have you ever wondered what happens after death? We no one really knows in Ninjago because it seems like everyone who dies comes back to life.
But here is what happens when people do die.
It's important to note that Day of the Departed is Novenber 3rd.
Day of the Departed is a holiday that you're supposed to spend with family and remember those who came before you. Unlike Dia los Muertos They cannot cross over, Unless a recent loved one has died.
When people die they become ghosts. The liveing is unable to see them, and they can not just control anything. They are just floating souls who get to see the what happens to their friends ans family after their death.
On day of the Departed any one who has died since the Day of the Departed the year before, will either be taken to one of two realms.
The Blessed realm and the Cursed realm.
Similar to the concept of Heaven and Hell where the good people go to the blessed realm, and bad people go to the cursed realm.
Good people are greated by their family to help them cross over into the Blessed realm while bad people are dragged in by the Preeminent into the Cursed realm.
Very few ghosts are able to possess people and objects. When they can it's because they were cursed.
Morro was cursed by the Preeminent. She wanted him to set her free into Ninjago so she put a curse in him.
Bansha, Soul Archer, Ghoultar were all summoned by Morro using a cursed chest plate. When he summoned them it put a temporary curse on them allowing them to fight with Morro.
Cole was cursed by Yang to take his spot but Cole got out before he had to take Yang's place.
When ghosts are cursed there is always a twist.
Morro's curse is that if he dies/gets hit by water he will not be able to go back to ninjago even with a curse.
Those who are brought over by the cursed chest plate will lose one of 3 senses. Sight,hearing, and touch.
Those who lose the sense of sight will only be able to see darkness. Other senses will stay the same, making it nearly impossible to get around anywhere.
Those who lose their sense of hearing will not be able to hear anything but deafening silence, that's worse than being deaf and will eventually drive them to insanity.
Ghost who lose their sense of touch will not be able to hold anything, And they will not be able to possess others.
These 3 were chosen to drive them into insanity, because once ghosts dies are not supposed to come back, This prevents some from staying too long.
When Cole gets cursed he gets cursed by Yang, Cole doesn't realize it but Yangs see everything that hes doing it can cause Cole to hallucinate, He doesn't do it until Day of Departed because he didn't want the others to think there was something wrong with Cole and try to fix it.
This is just an idea. I'll probly change it later. Ask me if there's anything else you want to know. I have a million ideas.