Leonardo, Sewer Samurai + Solemnity + Grinding Station + Phyrexian Walker

Leonardo, Sewer Samurai

Solemnity

Grinding Station

Phyrexian Walker

How it works

1. Activate Grinding Station by tapping it and sacrificing Phyrexian Walker.
2. Cast Phyrexian Walker from your graveyard by paying 0. It will not enter with a finality counter on it due to Solemnity.
3. When Phyrexian Walker enters, Grinding Station triggers, untapping Grinding Station.
4. Repeat.

This ingenious loop uses Grinding Station as an engine of relentless destruction, sacrificing Phyrexian Walker over and over to mill your opponents clean out of the game. The magic truly holds together because Solemnity stands watch on the battlefield, quietly neutralizing the finality counters that Leonardo, Sewer Samurai would normally impose, allowing Phyrexian Walker to return from the graveyard indefinitely. With Leonardo, Sewer Samurai granting you permission to recast the tiny artifact creature straight from your graveyard, every entry triggers Grinding Station to untap itself and repeat the cycle endlessly.