Furnace Scamp

A one-power attacker whose entire threat is conditional on connecting, then walking off the board. The damage clause turns the smallest possible body into a four-point swing: one in combat, three on the sacrifice, but only if the defender lets the hit land and only once. That dependency is the whole bargain. The creature is harmless on the ground if it can be blocked or chumped, so its value lives in the windows where the opponent cannot afford to trade a blocker or is tapped out: it punishes a stumble rather than dictating one. The sacrifice is optional, a clause worth more than it first reads, since a board state where you would rather keep a one-drop attacker than convert it into burn does occasionally exist. Functionally it sits in the lineage of cheap red creatures that close out a game from a near-dead opponent: a body that mostly does one point but converts to reach when the math is right. The Phyrexian Beast typing and the self-immolating payoff fit the era's appetite for aggressive one-drops that spend themselves for value. The combat-damage trigger is the catch that separates it from a burn spell on legs: it has to survive a turn, attack, and connect before any of that three damage materializes, which is a tall order for a 1/1 in any deck not already racing.