Leonardo, Sewer Samurai + Solemnity + Ashnod's Altar + Rograkh, Son of Rohgahh

Leonardo, Sewer Samurai

Solemnity

Ashnod's Altar

Rograkh, Son of Rohgahh

How it works

1. Activate Ashnod's Altar by sacrificing Rograkh.
2. Cast Rograkh from your graveyard by paying 0. It will not enter with a finality counter on it due to Solemnity.
3. Repeat.

This loop is a masterclass in turning a restriction into an engine, using Solemnity to completely blank the finality counters that Leonardo, Sewer Samurai would otherwise place on your recurring threats. With that protection in place, Leonardo allows you to continuously cast Rograkh, Son of Rohgahh straight from your graveyard for zero mana, since its power and toughness comfortably fit the required threshold. Every time Rograkh returns to the battlefield, you can immediately feed it to Ashnod's Altar to generate a steady stream of colorless mana while fueling infinite sacrifice and death triggers.