Emberheart Challenger

The interesting thing about stapling Valiant onto a prowess body is that the two triggers pull in opposite directions and then reinforce each other. Prowess wants noncreature spells thrown at anything; Valiant wants a spell or ability aimed at this creature specifically. A burn spell pointed at your own mouse does both jobs at once: the prowess pump fires, the Valiant impulse-draw fires, and you keep the creature alive because it just grew. That is the design seam this card lives in, rewarding a build where cheap targeted effects are payment rather than removal aimed elsewhere. Haste is the piece that makes the aggression real, letting the whole sequence resolve the turn it lands instead of telegraphing itself. Note the Valiant clause fires only on the first target each turn, so the reward is one card of advantage per turn rather than an open-ended engine: you get the impulse draw once, then any further pumps are pure prowess. It is a two-drop that asks its deck to be built around pointing spells at your own team, a fair bit of demand for the slot, and it pays that demand back in the currency low-curve red decks care about most: a body that outgrows blockers and refills the hand at the same time.