Gimli's Fury

The pump spell as legendary reward. A +3/+2 for two mana is a fine, unremarkable combat trick on its own: enough to win most bounces of the board, cheap enough to hold up as a bluff, nothing that rewrites the math. The trample rider is where the card takes a side. By gating the extra keyword behind the legendary supertype, the design turns a generic trick into a payoff for a deckbuilding constraint you have already agreed to, and legend-heavy decks are exactly the kind that need help pushing damage through a clogged board. That conditional is the whole design conversation: the baseline is priced for everyone, but the ceiling only shows up if you have committed to a critical mass of legendary creatures. The instant timing keeps the trample relevant, since the reward lands in the combat step where it converts to actual life loss rather than at sorcery speed where you would have to commit before blocks, letting an opponent chump safely. It rewards the same building pattern that legendary-matters shells have always chased, without demanding that pattern to be functional at all: the floor is a serviceable pump, and the ceiling is a targeted incentive to point your deck at a legendary-matters theme.