from the AD&D fiend folio

Revenant

CREATURE TYPE: Undead
CLIMATE/TERRAIN: Any/Any
FREQUENCY: VR
ORGANIZATION: Solitary
ACTIVITY CYCLE: Night
DIET: Nil
INTELLIGENCE: special
TREASURE: nil
ALIGNMENT: N
NO. APPEARING: 1
ARMOR CLASS: 10
MOVEMENT: 9
HIT DICE: 8
THAC0: 13
NO. OF ATTACKS: 1
DAMAGE/ATTACK: 2d8
SPECIAL ATTACKS: Yes
SPECIAL DEFENSES: Yes
SIZE: M
MORALE: special
XP VALUE: 3000
PAGE NO.: MM 302 FF 75, DRC 207

vengeful spirit risen to destroy killer, never uses weapons, strangles victim until killed, gaze vs killer save vs spell or paralyzed 2d4 rnds, regenerate 3 hp/rnd except fire, immune: acid & gas, permenant destruction by fire, cannot be raised, turned or effected by holy symbol/water, retains ability w/ min scores above