Ash, Party Crasher

Celebration asks you to flood the board in a single turn, and this Boros two-drop is the aggressive payload built to cash that in. The condition is stricter than it reads: the counter only lands when a pair of nonland permanents has hit the battlefield under your control during the same turn Ash swings, which turns growth from passive value into a tax on your sequencing. You cannot dribble your hand out across three turns and collect the bonus; you have to hold, commit, and attack, ideally the turn you unload a couple of cheap creatures or tokens alongside the swing. Haste is what closes the loop: the trigger fires on attack, so a body that can attack the turn it lands converts a wide dump into immediate extra damage rather than a delayed threat.

What makes the design tick is that the scaling is opt-in and repeatable but never automatic. Every attack step poses the question again: can you meet the threshold once more, or have you already spent your development? A good pilot ends up rationing permanents into attack steps rather than curving them out for tempo alone. It is a small legendary body that grows only as fast as you can time your board development to its combat trigger, which plants it firmly in the go-wide aggressive lineage where board count and clock outrun card advantage.