Mortuary + Sarcatog + Shield Sphere + Gwenom, Remorseless

Mortuary

Sarcatog

Shield Sphere

Gwenom, Remorseless

How it works

1. Activate Sarcatog 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 Sarcatog ability.
4. Cast Shield Sphere from the top of your library by paying 0 life.
5. Repeat.

This clever loop turns zero-mana artifacts into a lethal engine by using Mortuary to seamlessly recycle Shield Sphere straight back to the top of your library whenever it is sacrificed. While Sarcatog provides the necessary sacrifice outlet to keep the cycle spinning, Gwenom, Remorseless is the true catalyst that makes the whole thing viable: its triggered ability lets you bypass mana costs by paying life instead, allowing you to recast Shield Sphere for free directly off the library.