False Call. The Corpse Weeper mimics the death rattle or call of help of its recent victim, usually to lure prey. The Corpse Weeper must be in contact with the dead body of a creature to mimic its sound.

Grappler. The Corpse Weeper has advantage on attack rolls against any creature grappled by it.

Multiattack. The Corpse Weeper makes two attacks with its claws. It can use its Feeding Appendages or Siphon Bodily Fluids in place of one claw attack.

Claw. Melee Weapon Attack: +8 to hit, reach 5 ft., 1 target. Hit: 9 (1d6 + 5) slashing damage.

Feeding Appendages. Melee Weapon Attack: +8 to hit, reach 5 ft., 1 target. Hit: 9 (1d6 + 5) bludgeoning damage. A medium or smaller creature is then grappled by long appendages from its mouth (escape DC 13). The Corpse Weeper can only grapple one creature at a time. It can perform the Siphon Bodily Fluids action to a grappled creature as a bonus action.

Siphon Bodily Fluids. Melee Weapon Attack: +6 to hit, reach 5 ft., 1 target. Hit: 15 (3d6 + 3) piercing damage. The target must succeed on a DC 13 Constitution saving throw or its hit point maximum is reduced by an amount equal to the damage taken. This reduction lasts until the target finishes a short or long rest. The target dies if this effect reduces its hit point maximum to 0.