Mortuary + Extruder + Bolas's Citadel + Ornithopter

Mortuary

Extruder

Bolas's Citadel

Ornithopter

How it works

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

This ingenious loop transforms a humble zero-mana flyer into an engine of endless power by turning Extruder's artifact sacrifice outlet into a recycling machine. Whenever you feed Ornithopter to Extruder's ability, Mortuary immediately catches the dying thopter and places it right back on top of your library. That positioning is vital because Bolas's Citadel lets you cast that very same Ornithopter straight from your library for zero life, resetting the cycle entirely. As you repeat this process endlessly, Extruder can distribute infinite +1/+1 counters to your creatures while generating boundless death triggers and storm count.