Part the Flesh is a weapon action granted by 
Fleshrender.
Description
Thrust forward with diabolical precision, possibly stymying your target's ability to heal.
Properties
- Damage
1d8 (1~8) 
Bludgeoning damage - + 3
Necrotic damage - Details
Melee: 1.5 m / 5 ft
Recharge: Short rest
Condition: Rended Flesh
Duration: 3 turns turns
CON Save saving throw
- Affected entity can't be healed and can't gain Temporary Hit Points.
How to learn
Granted by the weapons:
Fleshrender
Render of Scrumptious Flesh (inaccessible)