By: Vivek Jain
Animewelt.com
Like all Ajins, Kei is completely immortal, he is unable to die under any circumstances such as being completely crushed, decapitated, or even due to malnutrition.
Ban can never die, not from fire , not from being cut into piece nor even from being his heart taken out from his body and when this combines with his skill of snatch to rob his opponent speed and strength he is a beast.
Skeleton From Skeleton soldier couldn't protect the dungeon
In a tragic turn of events he also dies unable to protect her but after his death, he is resurrected back in time and in this turn, he will do his all to save his master.
The origin of Muzan is unknown but he was affected by a virus that made him immortal and turned him in a combination of Count Dracula and a zombie.
But the most dangerous thing about him is the ability that he gets from his stand is the ability to control time, he can stop time which make his opponent think he is moving at ultra fast speed .
Zeref was considered the strongest most evilest mage of all time in the fairy tail universe. A mage with a very black History full of death and destruction wherever he is present.
Unruin is also a negator from undead unluck having a weaker version of the Undead ability, He is like a Dracula who has control over shadows and blood.
Sukuna the King of Curses was once a normal human who had an immense amount of Curse energy and because of this curse energy which gives him an infinite amount of life energy he can't be killed.
As a result of extensive experimenting with the Jashinists' various techniques, Hidan's main advantage is his inability to die from virtually all causes, with the exception of malnutrition.