Leonardo, Sewer Samurai + Tatterkite + Ashnod's Altar + Savvy Trader

Leonardo, Sewer Samurai

Tatterkite

Ashnod's Altar

Savvy Trader

How it works

1. Cast Tatterkite from your graveyard by paying 2 due to Savvy Trader. It won't enter with a finality counter on it due to its static ability.
2. Activate Ashnod's Altar by sacrificing Tatterkite, adding CC
3. Repeat.

This clever loop lets you endlessly sacrifice and recast Tatterkite, fueled entirely by the mana-generating power of Ashnod's Altar. The engine works smoothly because Savvy Trader provides a vital cost reduction that makes casting Tatterkite cheaper, while also letting you play it straight from the graveyard. That graveyard casting is enabled by Leonardo, Sewer Samurai, which allows you to cast creatures with power or toughness 1 or less from your graveyard during your turn. Normally, Leonardo would brand that creature with a finality counter, but Tatterkite's own static ability prevents counters from being put on it at all, bypassing the exile clause and keeping the fodder completely fresh for another trip through the altar.