Mortuary + Blasting Station + Phyrexian Walker + Bolas's Citadel

Mortuary

Blasting Station

Phyrexian Walker

Bolas's Citadel

How it works

1. Activate Blasting Station by tapping it and 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 Blasting Station ability.
4. Cast Phyrexian Walker from the top of your library by paying 0 life.
5. When Phyrexian Walker enters, Blasting Station triggers, untapping Blasting Station.
6. Repeat.

This elegant loop transforms the ultimate cost-free creature into a lethal weapon by turning the top of your library into an endless armory. With Bolas's Citadel allowing you to cast spells directly from your library, you can replay the zero-mana Phyrexian Walker for the price of zero life over and over again. Every time that tiny artifact creature hits the graveyard, Mortuary quietly intercepts it and places it right back on top of your library to repeat the cycle. Meanwhile, Blasting Station acts as both the sacrificial outlet and the win condition, untapping itself in response to each new arrival so you can continually sacrifice and recast the Walker to blast your opponents out of the game.