Fatal Frenzy

The math is the trap. Doubling a creature's power for three mana and stapling on trample reads like a finisher button, and on a big enough attacker it ends the game outright: a six-power creature swings for twelve, and trample means chump blockers buy nothing. But the sacrifice clause is the entire transaction. You are not borrowing the damage, you are spending the creature to get it, which collapses the spell's window to exactly one combat step. There is no value to bank, no permanent left standing, no second swing. That single-use framing puts it a category away from an ordinary pump spell; this is closer to converting a board presence directly into a number, then losing the board. The wrinkle that lifts it above a pure haymaker is the forced death. Because the creature is going to die regardless once the turn ends, pairing the spell with a sacrifice payoff means the loss is already accounted for: you were writing the body off anyway, so the +X/+0 and trample ride along free on a creature you had already mortgaged. Read that way, it stops being a combat trick and becomes a sacrifice-outlet finisher that happens to deal damage on its way to the bin. The commitment is the cost: you have to be far enough ahead on board that trading a creature for a lethal swing beats keeping it.