Leonardo, Sewer Samurai + Solemnity + Ornithopter + Yahenni, Undying Partisan

Leonardo, Sewer Samurai

Solemnity

Ornithopter

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing Ornithopter.
2. Cast Ornithopter from your graveyard by paying 0. It will not enter with a finality counter on it due to Solemnity.
3. Repeat.

This clever loop turns the unassuming Ornithopter into an infinite sacrifice engine by leveraging Leonardo, Sewer Samurai to repeatedly recast it from the graveyard for free. While Leonardo normally saddles recursion victims with a finality counter, Solemnity’s strict blanket prohibition short-circuits that drawback entirely, letting the mechanical insect slip back onto the battlefield completely clean every single time. Meanwhile, Yahenni, Undying Partisan happily consumes the zero-mana artifact at will, feeding on the endless procession of sacrifices to generate a staggering storm count and infinite triggers.