Tavern Scoundrel

Coin-flip payoffs usually live and die on variance: a swingy gamble welded to a body, and you make peace with the fifty-percent misses. This design converts the gamble into a resource loop. Its activation turns a permanent you no longer want into a coin flip, and the flip is where the reward sits: two Treasures on a win. Because the flip taps the creature, it happens once per turn under normal circumstances, so throughput comes not from re-flipping but from what each flip yields and what you feed it. The Treasures pay along several axes: color-optional ramp, mana for the next turn's activation, and artifact fodder for the payoffs that count them. That sacrifice cost is the hinge the whole engine turns on, because it wants inputs you were going to discard anyway, which pushes toward a permanent economy of tokens, expiring enchantments, and spent creatures worth grinding through. With three toughness against one power, the stat line holds ground while it launders spare permanents into fixing and fuel. What keeps this an actual engine is the way the flip and the sacrifice feed each other: the sacrifice funds the flip, the flip funds the next sacrifice, and the variance gets absorbed because even a loss only costs you fodder you did not want in the first place.