Vicious Kavu

A 2/2 that hits as a 4/2 the moment it turns sideways, with the swing-only pump as the design's whole bargain: the creature buys four points of damage on offense for three mana but offers nothing on defense, where it stays a vanilla 2/2 that trades down against almost anything. The boost triggers on the declaration of attack, so it stacks with anthems and other static effects before blockers are chosen, and it punishes an opponent who keeps only a 2/2's worth of blocker back. The bonus lasts until end of turn rather than evaporating once damage is dealt, so a Vicious Kavu that swings stays a 4/2 through the post-combat main phase, relevant if a sacrifice outlet or a second combat wants the larger body, though by the next upkeep it has shrunk back to its base size and contributes nothing on the crackback. The Kavu were the era's connective creature type, a beast race that ran across color pairs as tribal glue, and this is the aggressive Rakdos cut of that family: a body built to attack and keep attacking, indifferent to what it leaves behind. What it cannot do is hold a line or threaten a stalled board. That makes it clean beatdown filler, a creature whose value is denominated entirely in damage dealt to the player, built for the kind of low-curve red-black deck that would rather race than grind.