Mortuary + Harvester of Souls + Omarthis, Ghostfire Initiate

Mortuary

Harvester of Souls

Omarthis, Ghostfire Initiate

How it works

1. Cast Omarthis by paying 0.
2. Omarthis enters and dies as a state-based action due to having 0 toughness, triggering Mortuary and Harvester of Souls.
3. Resolve the Mortuary trigger, putting Omarthis from your graveyard onto the top of your library.
4. Resolve the Harvester of Souls trigger, causing you to draw a card, thus drawing Omarthis from your library.
5. Repeat.

This clever loop turns zero-mana casting into a self-sustaining engine by abusing how Omarthis, Ghostfire Initiate enters the battlefield as a creature with zero toughness and immediately hits the graveyard. When that happens, Mortuary steps in to instantly rescue Omarthis from the graveyard and place it right back on top of your library, bypassing conventional death by keeping the card flowing. Meanwhile, Harvester of Souls watches over the carnage, turning every single one of those recurring demises into a fresh card draw that puts Omarthis straight back into your hand for zero mana.