Leonardo, Sewer Samurai + Solemnity + Altar of Dementia + Memnite

Leonardo, Sewer Samurai

Solemnity

Altar of Dementia

Memnite

How it works

1. Activate Altar of Dementia 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 uses Leonardo, Sewer Samurai's graveyard-casting ability to turn Memnite into a recurring resource, letting you sacrifice it repeatedly to Altar of Dementia for infinite mill and death triggers. While Leonardo normally saddles creatures cast from the graveyard with a finality counter, Solemnity’s static replacement effect steps in to prevent those counters from ever being placed. Because Solemnity keeps Memnite pristine every time it leaves the graveyard, you can cast it for free over and over again without ever running out of fuel.