Leonardo, Sewer Samurai + Solemnity + Blasting Station + Memnite

Leonardo, Sewer Samurai

Solemnity

Blasting Station

Memnite

How it works

1. Activate Blasting Station by tapping it and 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. When Memnite enters, Blasting Station triggers, untapping Blasting Station.
4. Repeat.

This clever loop turns the unassuming Memnite into an infinite ammunition engine by leveraging the graveyard-casting permission granted by Leonardo, Sewer Samurai. While Leonardo normally saddles creatures cast from the graveyard with a finality counter, Solemnity steps in as a brilliant rules-bypass, entirely preventing those counters from ever being placed. This allows you to endlessly sacrifice Memnite to Blasting Station and immediately recast it for free, since Blasting Station untaps every time a creature enters the battlefield.