Death Clutch

You speak a word of Necromantic Power and beckon the Target's Heart to come to you. The Target must make a Constitution Saving throw. On a Success they take 8d10 Necrotic Damage and id incapacitated. On a Failure the Target's Heart is ripped from their chest and leaps into your open hand.

A creature with their Heart Removed can make a DC 20 Constitution Saving throw to continue living for up to 4 rounds. A creature with their Heart Removed can only survive this experience by having their heart returned to them and having any of the following spells cast upon them: Heal, Regenerate, Mass Heal.