Mortuary + Omarthis, Ghostfire Initiate + Fecundity

Mortuary

Omarthis, Ghostfire Initiate

Fecundity

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 Fecundity.
3. Resolve the Mortuary trigger, putting Omarthis from your graveyard onto the top of your library.
4. Resolve the Fecundity trigger, causing you to draw a card, thus drawing Omarthis from your library.
5. Repeat.

This clever loop turns the inherent fragility of casting Omarthis, Ghostfire Initiate for zero mana into an endless cycle of rebirth, fueled by the relentless card advantage of Fecundity whenever a creature dies. As Omarthis hits the graveyard from the battlefield, Mortuary steps in to instantly rescue it from the bin by placing it right back on top of your library. From there, Fecundity allows you to draw that very card, returning Omarthis to your hand and ready to be cast for zero mana all over again.