Bulk Up

Doubling power is a wildly percentage-dependent effect, and this instant is built to be spent on the moment the multiplier is largest. On a 2/2 it is a marginal pump; on a trampler carrying a stack of counters, or a creature already swinging for double digits, the same two mana turns a good attack into a lethal one. That variance is the whole design brief: it costs almost nothing precisely because it does almost nothing in a vacuum, and everything in the right combat step. Because it resolves at instant speed, the real window is after blocks are declared, when the defending player has committed to a block that suddenly cannot survive the doubled number. Flashback then gives the card a second life: the first cast is the cheap ambush, and the graveyard cast is the expensive follow-through you hold for the game where one big swing is not enough. Six mana is a steep tax for a repeat doubling, but the point is that the effect never leaves; a removal spell answers the first Bulk Up, not the recast. It is a small, honest piece of aggressive plumbing, the kind of red pump that has existed in one form or another since the early years of the game, given a modern two-use frame so the tempo hit of drawing it late lands softer.