Mortuary + Bolas's Citadel + Ornithopter + Yahenni, Undying Partisan

Mortuary

Bolas's Citadel

Ornithopter

Yahenni, Undying Partisan

How it works

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

This loop turns your library into an endless revolving door of zero-cost artifacts by cleverly bypassing mana costs altogether. With Bolas's Citadel sitting on the board, you can cast the top card of your library directly—paying a cool zero life to deploy Ornithopter since its mana value is zero. From there, you use Yahenni, Undying Partisan to sacrifice the thopter, which immediately trips Mortuary's trigger to place Ornithopter right back on top of your library for another free cast. This continuous cycle generates infinite storm count and endless creature triggers without ever draining your life total.