Moraug, Fury of Akoum
The extra combat step is the loud part of the design, but the anthem clause is what makes the loop lethal instead of merely repetitive. Most extra-combat effects run into diminishing returns: your creatures untap, but they hit for the same number each swing, so a second combat is worth exactly one more attack's worth of damage. Here, every creature grows by one power for each time it has already attacked this turn, so the third swing lands harder than the second, and the fourth harder than the third. Combine that scaling with a landfall trigger that both grants the additional combat and untaps your board, and a single main-phase land drop opens the door to a chain: play a land, get a combat, and if you can generate more lands mid-turn, each one stacks another attack and another round of accumulating power. The 6/6 body is almost incidental; the reward structure lives entirely in how many times you can put lands onto the battlefield during a main phase. That constraint is the balancing act. The ability only fires during your main phase and only off lands entering, so the card demands a deck engineered to replay, flicker, or otherwise re-drop lands on the same turn; simply ramping into it is not enough. Built correctly, the math bends toward the absurd; built as a standalone haymaker, it is a large Minotaur that occasionally swings twice.
