Wall of Limbs

Defender (This creature can't attack.) Whenever you gain life, put a +1/+1 counter on this creature. {5}{B}{B}, Sacrifice this creature: Target player loses X life, where X is this creature's power.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6ocxe1901jpb1hcjjerwq9.