Mortuary + Phyrexian Altar + Memnite + Bolas's Citadel

Mortuary

Phyrexian Altar

Memnite

Bolas's Citadel

How it works

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

This elegant loop turns zero-mana artifacts into a limitless engine, fueled by Mortuary's ability to seamlessly redirect dying creatures back to the top of your library. Phyrexian Altar provides the sacrifice outlet needed to generate a steady stream of colored mana while feeding the graveyard, and Memnite serves as the ultimate recurring fuel due to its zero mana cost. Meanwhile, Bolas's Citadel allows you to immediately replay that very same Memnite straight from the top of your library, bypassing mana costs entirely by trading life instead—a cost easily ignored when the engine generates infinite resources.