Mortuary + Lithatog + Shield Sphere + Gwenom, Remorseless

Mortuary

Lithatog

Shield Sphere

Gwenom, Remorseless

How it works

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

This clever loop transforms free resources into an engine of endless iteration by turning Gwenom, Remorseless into a casting window from the top of your library. While Gwenom allows you to bypass mana costs by paying life instead, Shield Sphere acts as the ultimate zero-cost fuel because its mana value is zero, meaning casting it repeatedly costs you nothing. Whenever Lithatog demands a sacrifice, you feed it the Shield Sphere, which triggers Mortuary to seamlessly recycle the artifact back to the top of your library just in time for Gwenom's ability.