Revenant

Revenants are entities who have died and been brought back to life in the pursuit of either revenge or an unfinished goal.

Appearance
Revenants appear as they did in life. Keyleth noted that Vax'ildan, having been brought back as a revenant, felt colder than he had previously.

Characteristics
Mechanically, revenants are a subrace. The base Constitution score increases by 1.

Abilities
Revenants have the same abilities they had in life, with the following additional powers:
 * If they begin a turn with fewer than half their total hit points, they regain 1 HP.
 * If they die, they return to life 24 hours later. This includes the reformation of a new body, if their body is destroyed. In Vax's case, even when his body wasn't destroyed, it burned to ash after his death and he then reappeared 24 hours later.
 * They know the distance from and direction to all creatures pertaining to their goal, provided they are on the same plane of existence.

Known Revenants
Vax'ildan became a revenant after he made a deal with the Raven Queen after being disintegrated by Vecna. He would live until the threat of Vecna had been dealt with, after which he would pass on to her realm.