Mistfire Adept
Prowess and an evasion-grant share the same trigger here, and that overlap is the whole point: every noncreature spell you cast both pumps this Monk and hands flying to a creature of your choice. Most prowess bodies only grow; this one converts the same spell into a way to push damage through a clogged board, including onto itself when it is the size that needs to connect. The two effects compound in one window because they read off the same event, so a single cantrip turns a ground-stalled 3/3 into a 4/4 flier, or sends the buff to a bigger threat while the Monk holds back the floor. The cost of all this is a deckbuilding demand: the triggers fire only when you have noncreature spells to cast, so an empty hand leaves a plain 3/3 with two abilities waiting on a trigger that never comes. That tension defines where it belongs, in a spells-matter shell where the engine runs every turn rather than as a midrange creature you cast and pass. Spell-payoff bodies usually just reward stacking instants and sorceries by getting larger; the flying rider does the work most of them leave out, letting a board of small attackers actually close instead of merely swelling while the stall holds.

