What's Marvel's most unkillable superhero

Answer 1

There are many Marvel superhero's who physically cannot die. But I would probably say, Mr. Immortal or Deadpool.

Answer 2

Wolverine is often considered one of Marvel's most unkillable superheroes due to his powerful healing factor, adamantium skeleton, and fighting skills. His ability to rapidly regenerate from even the most devastating injuries makes him extremely difficult to kill.