Leonardo, Sewer Samurai + Solemnity + Sarcatog + Shield Sphere

Leonardo, Sewer Samurai

Solemnity

Sarcatog

Shield Sphere

How it works

1. Activate Sarcatog 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 static effect of Solemnity, which brilliantly prevents any finality counters from ever attaching to your returning creatures. With that restriction bypassed, Sarcatog can repeatedly consume Shield Sphere as a zero-cost sacrifice fodder, fueling its own ability while sending the artifact straight back to the graveyard. Because Shield Sphere can then be recast directly from the graveyard for free thanks to Leonardo, Sewer Samurai's graveyard-casting permission, you create a self-sustaining cycle that generates an endless torrent of triggers and an infinitely massive Sarcatog.