Mortuary + Extruder + Phyrexian Walker + Gwenom, Remorseless

Mortuary

Extruder

Phyrexian Walker

Gwenom, Remorseless

How it works

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

This cunning loop turns the zero-cost artifact creature Phyrexian Walker into an infinite engine for sacrifice and death triggers. By feeding the Walker into Extruder, you not only trigger Extruder's ability to pump up your board with +1/+1 counters, but you also activate Mortuary, which immediately rescues the Walker from your graveyard and places it right back on top of your library. From there, Gwenom, Remorseless steps in to let you cast the Walker straight off the top of your library for free, bypassing its mana cost by paying zero life. Because Mortuary and Extruder work together seamlessly to recycle the same automaton indefinitely, you can repeat this process as many times as you desire to build an overwhelming army in a single turn.