Leonardo, Sewer Samurai + Solemnity + Bloodflow Connoisseur + Shield Sphere

Leonardo, Sewer Samurai

Solemnity

Bloodflow Connoisseur

Shield Sphere

How it works

1. Activate Bloodflow Connoisseur 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 recursive loop exploits the interaction between Leonardo, Sewer Samurai and Solemnity to completely bypass the restriction on creatures cast from the graveyard. Normally, Leonardo grants a way to replay low-power creatures with finality counters, but Solemnity steps in to prevent those counters from ever being placed on them. By sacrificing Shield Sphere to Bloodflow Connoisseur, you send the free-to-cast artifact creature right back to the graveyard where Leonardo can pull it out again. This lets you cycle Shield Sphere infinitely, feeding Bloodflow Connoisseur an endless stream of sacrifices to grow it to towering proportions.