Mortuary + Umbral Collar Zealot + Ornithopter + Gwenom, Remorseless

Mortuary

Umbral Collar Zealot

Ornithopter

Gwenom, Remorseless

How it works

1. Activate Umbral Collar Zealot by sacrificing Ornithopter
2. When Ornithopter dies, Mortuary triggers, putting Ornithopter from your graveyard onto the top of your library.
3. Resolve the Umbral Collar Zealot ability.
4. Cast Ornithopter from the top of your library by paying 0 life.
5. Repeat.

This ingenious loop turns a harmless little flyer into an infinite engine by leveraging the passive guidance of Mortuary, which intercepts your sacrifices to instantly recycle fallen creatures back to the top of your library. From there, Umbral Collar Zealot provides the sacrificial outlet to feed the loop while letting you continuously surveil, ensuring you always know what's waiting for you. The real magic happens when Gwenom, Remorseless is on the battlefield, as its static-granting attack trigger allows you to bypass mana costs entirely and cast cards directly from the top of your library by paying life instead—making Ornithopter's zero-mana cost completely free to recast over and over again.