Mortuary + Phyrexian Walker + Bolas's Citadel + Bartolomé del Presidio

Mortuary

Phyrexian Walker

Bolas's Citadel

Bartolomé del Presidio

How it works

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

This elegant loop uses Bolas's Citadel to cast spells directly from the top of your library for life instead of mana, turning zero-cost creatures into free fodder. By sacrificing Phyrexian Walker to Bartolomé del Presidio, you trigger Mortuary to immediately recycle the Walker right back to the top of your library—ready to be cast again for zero life through Bolas's Citadel. Because the mana value of Phyrexian Walker is zero, you pay no life to repeat this process indefinitely, easily stacking up infinite sacrifice triggers, storm count, and +1/+1 counters on Bartolomé del Presidio.