Mortuary + Carmen, Cruel Skymarcher + Viscera Seer + Gwenom, Remorseless

Mortuary

Carmen, Cruel Skymarcher

Viscera Seer

Gwenom, Remorseless

How it works

1. Activate Viscera Seer by sacrificing it.
2. When Viscera Seer dies, Mortuary and Carmen trigger.
3. Resolve the Mortuary trigger, putting Viscera Seer from your graveyard onto the top of your library.
4. Resolve the Carmen trigger, causing you to gain 1 life and put a +1/+1 counter on Carmen.
5. Resolve the Viscera Seer ability.
6. Cast Viscera Seer from the top of your library by paying 1 life.
7. Repeat.

This loop turns a simple sacrifice outlet into an engine of endless growth by exploiting how library manipulation interacts with graveyard-to-library replacement effects. When you sacrifice Viscera Seer to its own ability, Mortuary immediately redirects it from your graveyard back to the top of your library, while Carmen, Cruel Skymarcher rewards the sacrifice by growing stronger and gaining you life. Gwenom, Remorseless then bypasses traditional mana costs entirely, letting you recast Viscera Seer straight from the top of your library by paying life instead—a cost easily offset by Carmen's lifegain and Gwenom's own lifelink.