Dead-Eye The main villain of story who lot people see as devil who was bringed back to ninjago by Orano

as Orano was searching for something in cave he picked up red diamond what allowed Dead-Eye to enter Ninjago and corrupt Orano for unknown time

Dead-Eye don't personally fight.he just talks and tries creep ninjas out.by making clones of them using Lloyd and turns ninjas evil one by one

We have orano who did brutal mistake by Ever picking up that red diamond

Than we have kai who went by name Fire emperor for while

Than we have Kaia who sold her soul to Dead-Eye and Went by his name for while

Than we have Cole who wanted to help kaia by turning himself evil by allowing skull sorcerer skull to take over him and going name of Skull sorcerer

And than we have ceiline who wanted join his beloved Cole.she was warned not to but she allowed to darkness take control and called herself Queen of darkness

Dead-Eye did his first appearance in Stoned but it had proved that he was around while LPOTN happened and also before that so there chance he has been around since seabound or even way more before that but That theory was never confirmed

He did created clones of ninjas by capturing Lloyd

Dead-Eye face is void black so his face is actually never seen(ironic of a man who name litteraly contains eye).he wears mask and hoodie what has strange horns covered in blood attached to that and he wears red-black outfit

Dead-Eye is no human no oni no dragon hunter but we can call him that kind of spicies by the name i almost gave him.starkin so his people could be called Starkins at that point but in younger form of Dead-eye he did look shintarian alike but he didn't live in shintaro

That how he can control all elements is unknown.but i can promise that his not related to skykor family.there possiblity that he got these powers after capturing Lloyd but also possibility that how Starkins is created

Fun fact:he was orginally going to be female and named devil-eye but i loved that Dead-Eye joke in my head.and i feel like i should changed him to male because males are creepier in evil form in fiction