Mortuary + Bolas's Citadel + Bartolomé del Presidio + Ornithopter

Mortuary

Bolas's Citadel

Bartolomé del Presidio

Ornithopter

How it works

1. Activate Bartolomé del Presidio by sacrificing Ornithopter
2. When Ornithopter dies, Mortuary triggers, putting Ornithopter from your graveyard onto the top of your library.
3. Resolve the Bartolomé del Presidio ability.
4. Cast Ornithopter from the top of your library by paying 0 life.
5. Repeat.

This ingenious loop turns zero-mana artifacts into an endless engine of sacrifice and rebirth. With Bolas's Citadel granting you the ability to play cards directly from the top of your library for life instead of mana, Ornithopter becomes completely free to recast over and over. Every time Bartolomé del Presidio sacrifices the tiny flyer, Mortuary steps in to catch it in the graveyard and place it right back onto the top of your library, ensuring the Citadel can immediately cast it again.