Leonardo, Sewer Samurai + Solemnity + Thermopod + Crookshank Kobolds

Leonardo, Sewer Samurai

Solemnity

Thermopod

Crookshank Kobolds

How it works

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

This clever loop centers around Leonardo, Sewer Samurai, whose static ability lets you cast creature spells with power or toughness 1 or less directly from your graveyard during your turn. Since Crookshank Kobolds fits this bill with its zero-mana cost, it can be repeatedly sacrificed to Thermopod to generate red mana and fuel the entire cycle. The secret sauce that makes this sustainable is Solemnity, whose passive prevention of counters completely overrides Leonardo's drawback of putting finality counters on creatures cast from the graveyard. Together, these pieces let you endlessly recycle the Kobolds for infinite sacrifices, enters-the-battlefield triggers, and red mana.