Mortuary + Phyrexian Walker + Arcbound Ravager + Gwenom, Remorseless

Mortuary

Phyrexian Walker

Arcbound Ravager

Gwenom, Remorseless

How it works

1. Activate Arcbound Ravager 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 Arcbound Ravager ability.
4. Cast Phyrexian Walker from the top of your library by paying 0 life.
5. Repeat.

This intricate loop turns the graveyard into a conveyor belt by leveraging Mortuary's mandatory trigger to intercept creatures the moment they hit the bin and place them right back on top of your library. From there, Gwenom, Remorseless grants you permission to play cards directly off the top while bypassing their mana costs entirely by paying life instead, effectively casting Phyrexian Walker for zero mana. Meanwhile, Arcbound Ravager acts as the sacrificial engine that sends Phyrexian Walker to the graveyard in the first place, harvesting the resulting deaths to pile up an endless supply of +1/+1 counters and sacrifice triggers.