Leonardo, Sewer Samurai + Solemnity + Extruder + Shield Sphere

Leonardo, Sewer Samurai

Solemnity

Extruder

Shield Sphere

How it works

1. Activate Extruder by sacrificing Shield Sphere.
2. Cast Shield Sphere 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 a recurring workshop by pairing Leonardo, Sewer Samurai with the protective blanket of Solemnity. Because Solemnity prevents counters from being placed on artifacts and creatures, Leonardo's finality counters can never stick, allowing you to recast your fallen artifacts over and over. Shield Sphere serves as the perfect zero-mana fodder for this engine, feeding directly into Extruder's sacrifice ability to grow your team with infinite +1/+1 counters while triggering an endless cycle of sacrifices.