Mortuary + Falkenrath Noble + Bolas's Citadel + Carrion Feeder

Mortuary

Falkenrath Noble

Bolas's Citadel

Carrion Feeder

How it works

1. Activate Carrion Feeder by sacrificing it.
2. When Carrion Feeder dies, Mortuary and Falkenrath Noble trigger.
3. Resolve the Mortuary trigger, putting Carrion Feeder from your graveyard onto the top of your library.
4. Resolve the Falkenrath Noble 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 delightful loop turns the graveyard into a conveyor belt straight back to the top of your library, fueled entirely by life rather than mana thanks to Bolas's Citadel. By feeding Carrion Feeder to itself, you trigger Mortuary to place the insect right back on top of your library where Bolas's Citadel can immediately cast it again for a single life. Meanwhile, Falkenrath Noble watches the endless procession of sacrifices and converts every loop into draining your opponents out of the game while padding your own life total to keep the Citadel firing.