Abbot of Keral Keep

The bargain is that the card advantage and the body are the same two mana, and prowess is what reconciles them. A 2/1 that exiles the top of your library reads like raw value, but the catch is the clock: you only get to play that card this turn, which means the card rewards a deck already holding cheap noncreature spells to spend the exiled card on, not one hoping to bank it. That same hand of cheap spells turns the 2/1 into a real attacker, because each noncreature spell you cast pumps it, so the two abilities pull in one direction instead of competing for the mana. It is a refuel built for spell-dense aggro: cast it on a turn you have leftover mana, flip a land or a one-mana burn spell, and pivot the same play into pressure on the board. The temporary access window (play it now or lose it) is what keeps an aggressive two-drop from doubling as a no-strings card-draw engine. Dropped late it is a recoverable top-deck; dropped on curve it is a body that swells each time you fire off another noncreature spell behind it. The design captures something burn and tempo decks had long wanted: a way to convert excess mana into both cards and damage from a single creature slot.