|“||I shall not be defeated! If you defeat me, I will simply return, again and again! I am immortal! I cannot be vanquished!||„|
|~ Erazor Djinn|
|“||You do not need to worry about it. I'm tired to kill her every day. No matter how many times I kill her, she keeps coming back. So I'm going to kill her as many times is necessary. I'll kill her again, and again, and again, and again, and again, and again......||„|
|~ Mana Takamiya describing Kurumi Tokisaki|
Villains that are impossible to kill, which is referred as "complete immortality", as opposed to "biological immortality", which simply means they have an infinite life span but can die if killed through trauma. Such villains will survive absolutely anything one can throw at them, or either resurrect after beng destroyed.
Some of these villains owe their immortality to special magical items that, if destroyed, will kill them or leave them vulnerable to death, such as Davy Jones' Heart, Lord Voldemort's Horcruxes, or Kel'Thuzad's Phylactery. Characters like Sigma can return as long as his cognitive curcuits are not completely destroyed.
IMPORTANT: AGELESS VILLAINS WITH "BIOLOGICAL IMMORTALITY" DO NOT COUNT