Elvish Berserker

A one-drop attacker that turns the defender's own decision against them: gang-blocking, the instinctive way to kill a small creature, is exactly what feeds it. The pump scales with the block, so committing more bodies grows the Elf in lockstep with the damage it has to survive, and the defender has to do real arithmetic before declaring blockers. Send a single 1/1 to wall it and you have a 2/2 that wins the fight; send two creatures and the Elf grows to match, often surviving when a naive double-block would have killed an ordinary 1/1. What restrains the upside is the trigger condition itself: the bonus fires only on becoming blocked, never on attacking unopposed, so the attacker never controls whether the payoff happens. A defender who simply takes one point denies the upside entirely, which makes this less a beater than a tax on the block step. The pump is also temporary and combat-keyed: it does nothing while the Elf sits back, nothing against a removal spell, and the body reverts to a 1/1 once the turn ends. That narrowness is the price of the upside. What reads as an aggressive trigger functions, in play, as a deterrent that makes the opponent pay to block and pay again to block correctly.