Based on immortality, Zeref with and without FH and Aizen with Hogyoku are the ones, who are mostly very hard to kill.
The first one survives a complete destruction of his body and resist an Existence Erasure. The second one regenerate from a unknown degree when body and soul are complete...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.