Mortuary + Carrion Feeder + Shield Sphere + Gwenom, Remorseless

Mortuary

Carrion Feeder

Shield Sphere

Gwenom, Remorseless

How it works

1. Activate Carrion Feeder by sacrificing Shield Sphere
2. When Shield Sphere dies, Mortuary triggers, putting Shield Sphere from your graveyard onto the top of your library.
3. Resolve the Carrion Feeder ability.
4. Cast Shield Sphere from the top of your library by paying 0 life.
5. Repeat.

This clever loop transforms free sacrifice outlets into an endless engine by leveraging Mortuary's replacement-like trigger to immediately recycle fallen creatures back to the top of your library. Carrion Feeder serves as the engine's hungry core, growing larger with every iteration as it consumes the 0-mana Shield Sphere over and over again. Meanwhile, Gwenom, Remorseless provides the critical top-deck casting permission and life-payment alternative that lets you replay the zero-cost artifact infinitely without ever needing actual mana.