Foundry Champion

Count the creatures you control, then deal that much damage anywhere: it is a Fireball whose fuel is your board rather than your mana pool, and that points it squarely at a wide, tokens-forward red-white deck that has already flooded the table. A swarm converts the arrival trigger into reach, whether that means shoving the last points through a stalled ground or knocking a planeswalker off the board the moment it resolves. The dual firebreathing rounds it out, letting stray red or white mana push power or toughness in either direction, but the 4/4 body for six is intentionally plain; every point of value comes from what you develop before it hits.

That dependency is the honest cost. Land it while your side is bare and the trigger sputters for a point or two, leaving a sluggish midrange creature that can only claw toward relevance by feeding mana into its pumps a pip at a time. This rewards the player who has already won the development race and wants to cash that lead in at the instant of impact, not someone hunting for a self-contained threat. Think of it as the reward a go-wide plan collects at the finish line, a capstone for a shape of Boros aggression where your creature count is the spell.