The Darkness Crystal

Black spells you cast cost {1} less to cast. If a nontoken creature an opponent controls would die, instead exile it and you gain 2 life. {4}{B}{B}, {T}: Put target creature card exiled with The Darkness Crystal onto the battlefield tapped under your control with two additional +1/+1 counters on it.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o3rur1l5ppb1h9z0yfn78.