Leonardo, Sewer Samurai + Solemnity + Sarcatog + Memnite

Leonardo, Sewer Samurai

Solemnity

Sarcatog

Memnite

How it works

1. Activate Sarcatog 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 turns the graveyard into an endless workshop by combining Leonardo, Sewer Samurai's ability to cast small creatures from your graveyard with Solemnity's protective aura, which crucially prevents finality counters from ever touching your permanents. Because Solemnity stops those counters in their tracks, you can endlessly cast Memnite for free from your graveyard after Sarcatog feeds it to the graveyard as an artifact sacrifice. Sarcatog happily devours Memnite over and over to grow infinitely large until end of turn while generating an endless stream of sacrifice, death, and entry triggers to overwhelm your opponents.