Biomass Mutation

The trick is what it overwrites rather than what it adds. Most mass-pump effects stack a bonus on top of existing stats, so a board of 1/1 tokens swells uniformly and your real threats grow proportionally above them. Setting base power and toughness instead flattens everything to a single line: a yard of mana dorks and tokens all become whatever X buys, and your fatties get cut down to that same number right alongside them. That double edge is the design, and it points the card almost entirely at the go-wide swarm rather than the few-fatties board. As a finisher it converts a width of insignificant bodies into a lethal alpha strike for a price that scales to the board, paid at instant speed so it doubles as a combat-math reset after blocks are declared. The hybrid pips let it slot into either half of a Simic shell without committing to both colors of mana. The X is the whole tension: too little and the buff is irrelevant, too much and you have poured the turn into a one-shot swing whose bodies snap back to their printed stats when the effect ends, leaving nothing behind. A sweeper that catches the buffed board mid-swing erases the entire investment at once. It rewards a board already built wide and shallow, then asks you to name the number that ends the game.