Mortuary + Atog + Phyrexian Walker + Gwenom, Remorseless

Mortuary

Atog

Phyrexian Walker

Gwenom, Remorseless

How it works

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

This looping engine turns a zero-mana artifact creature into an infinite source of sacrifice, death, and storm triggers. You start by using Atog's sacrifice ability on Phyrexian Walker, which immediately triggers Mortuary to recycle the Walker straight back to the top of your library. From there, Gwenom, Remorseless provides the critical permission to cast spells directly from the top of your library and replaces the mana cost with a life payment. Because the Walker costs zero mana to cast, you pay zero life to redeploy it, letting you feed Atog and repeat the whole sequence indefinitely.