Leonardo, Sewer Samurai + Solemnity + Woe Strider + Shield Sphere

Leonardo, Sewer Samurai

Solemnity

Woe Strider

Shield Sphere

How it works

1. Activate Woe Strider 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 relies on Leonardo, Sewer Samurai to open your graveyard as a casting zone for small creatures, turning Shield Sphere into a recurring free resource since its power or toughness is 1 or less. Ordinarily, Leonardo would brandishingly exile your looping artifacts via finality counters, but Solemnity acts as an absolute shield against *all* counters, neutralizing both those finality markers and Shield Sphere's own self-shrinking drawback. Finally, Woe Strider provides the sacrifice outlet to send the Sphere back to the graveyard while granting you infinite scries and triggers, all fueled by the Sphere's zero-mana casting cost.