Courageous Goblin

A vanilla-looking 2/2 that hides a conditional payoff behind a battlefield you have to build first. Standing alone, it trades into the crowded two-mana field and gets walled the moment blockers pile up; the reward stays locked until a genuinely large threat is sitting next to it. Once you control something with power four or greater, the attack trigger swings this to a 3/2 with menace, an evasive body a stalled ground can no longer profitably block. That deferral is the whole design. A cheap creature that pumped and slipped past chumps every turn would be underpriced, so both the size bump and the evasion are held hostage to a board you assemble before the payoff comes due. The gating clause is the mechanical center: it asks the deck to curve upward, small into large, and hands the early plays a reason to stay relevant instead of falling off once the top of the curve arrives. This is common-rarity aggressive filler with a single honest job: give a red deck full of small bodies a concrete incentive to want a fatty out early, and reward the sequencing when it lands.