Mortuary + Ravenous Intruder + Ornithopter + Gwenom, Remorseless

Mortuary

Ravenous Intruder

Ornithopter

Gwenom, Remorseless

How it works

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

This clever loop lets you pump Ravenous Intruder infinitely by feeding it free mechanical fodder in the form of Ornithopter. As the Thopter hits the graveyard, Mortuary steps in to instantly recycle it right back to the top of your library. From there, Gwenom, Remorseless provides the crucial top-deck casting permission and life-payment replacement effect, allowing you to replay the zero-mana artifact for free and feed the Intruder all over again.