Leonardo, Sewer Samurai + Solemnity + Ravenous Intruder + Memnite

Leonardo, Sewer Samurai

Solemnity

Ravenous Intruder

Memnite

How it works

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

This clever loop transforms Memnite into a zero-mana engine for infinite sacrifices and storm count, fueled entirely by the graveyard-casting permission granted by Leonardo, Sewer Samurai. While Leonardo normally slaps a finality counter on anything brought back from the yard, Solemnity acts as a strict ward that prevents those counters from ever being placed. This allows you to endlessly replay the same little artifact creature for free, feed it to Ravenous Intruder to pump its power to astronomical heights, and trigger endless death and sacrifice effects without ever running out of fodder.