Breeding Pit

A token engine with a tax attached, built in the era when "go-wide" meant grinding out one body a turn and the cost of staying in the game was an upkeep payment you negotiated against your own mana. The two halves sit in deliberate tension: the end-step trigger hands you a Thrull, but the upkeep trigger threatens to eat the whole enchantment unless you feed it, so each token you bank carries a recurring tax that compounds against the rest of your plan. The Thrulls themselves are 0/1s, which tells you the design intent: this was never a clock, it was fodder, a renewing supply of bodies for sacrifice effects and chump blocks rather than a path to damage. That makes the math instructive. Left alone, the engine slowly drowns you in mana commitment for creatures that do nothing on their own; tied to a sacrifice payoff, the same trickle becomes an asset stream worth having. The bargain is the entire card. Fallen Empires was full of Thrull tribal pieces that wanted exactly this kind of steady, low-quality body generation, and Breeding Pit distills that bargain to its core: a permanent that keeps paying out only while you keep paying in, and whose value lives entirely in whatever you have lined up to convert those expendable tokens into something that matters.