Immortality

Immortality is the ability to have an extended lifespan. There are many variants of this ability, including:
 * Semi-immortality: the user does not age but remains vulnerable to wounds, illnesses, and/or injuries.
 * Reliant immortality: the user acquires immortality by anchoring their life to a particular object, source, and/or concept. Thus, the user remains alive so long as said object is existant/source remains plentiful/concept remains relevant.
 * True immortality: the user does not age after reaching a certain age; is immune to diseases, toxins, and drugs; and wounds heal rapidly.
 * Resurrective immortality: the user can be injured and can die but will rise from the dead after dying.

Known Users

 * Blackheart is functionally immortal, immune to the effects of aging and diseases.
 * Moonbeam (Dead Girl) has already died but has been reanimated as a living corpse and, thus, cannot die again.