Mortuary + Carrion Feeder + Popular Egotist + Gwenom, Remorseless

Mortuary

Carrion Feeder

Popular Egotist

Gwenom, Remorseless

How it works

1. Activate Carrion Feeder by sacrificing it.
2. When Carrion Feeder dies, Mortuary and Popular Egotist trigger.
3. Resolve the Mortuary trigger, putting Carrion Feeder from your graveyard onto the top of your library.
4. Resolve the Popular Egotist trigger, causing you to gain 1 life and target opponent to lose 1 life.
5. Resolve the Carrion Feeder ability.
6. Cast Carrion Feeder from the top of your library by paying 1 life.
7. Repeat.

This loop turns Carrion Feeder into an endlessly recurring threat by leveraging Mortuary to seamlessly recycle it from the graveyard straight to the top of your library each time it dies. While Carrion Feeder's activated ability keeps the sacrifice going and pumps its stats, Gwenom, Remorseless grants you the crucial ability to play cards from the top of your library, bypassing the mana cost by paying life instead—a cost easily offset by the steady life drain from Popular Egotist's triggered ability every time a permanent is sacrificed.