Which superheros are immortal?

Several superheroes possess immortality or near-immortality as part of their abilities. Notable examples include Wolverine, who has a regenerative healing factor that significantly slows his aging, and Deadpool, whose healing factor also prevents death. Other characters like Thor, being an Asgardian god, and the Eternal Ikaris are essentially immortal due to their divine or cosmic nature. Additionally, characters like Vandal Savage and Ra's al Ghul have access to immortality through methods like the Lazarus Pits.