Preservation. While wearing these wrappings, you have resistance against Necrotic damage and age half as fast as normal.
Desecrated Touch. When you hit a creature with an unarmed strike while wearing these wrappings you deal an extra 1d4 necrotic damage.
Wrap Attack. When you take the attack action, you can use one attack to attempt to wrap one creature within 30ft. of you with these wrappings by making an unarmed strike. On a succesful hit the target is grappled. The scape DC is equal to your Ki save DC. Until the grapple ends, the target is restrained. You can use this feature twice per short rest.
Siphon Life. You can use a bonus action to drain a creature you grappled with Wrap Attack. You force the creature to make a constitution saving throw against your Ki save DC. On a failed save they take 4 rolls of your martial arts die of necrotic damage, half on a succesful save, and you regain hit points equal to half the amount of necrotic damage dealt. You can use this feature twice per short rest.

Notes: Resistance: Necrotic, by a monk