Bloodwater Entity

The enters trigger is the whole reason this body exists at the price it does. A 2/2 flier with prowess is a serviceable shell for an Izzet spells deck, but the rebuy clause is what ties it to that archetype rather than leaving it as a generic tempo creature: when it enters, you can put one instant or sorcery from your graveyard on top of your library. That is a one-shot effect, not a loop, and the distinction is exactly what keeps the rate honest. The two halves of the card still reinforce each other across a game: a spells-matters deck casts noncreature spells to grow the body, those spells fill the graveyard, and the entry trigger hands one of them back. The cost is folded into the timing. You draw the rebought card on your next draw step, so the value is deferred a full turn rather than refilling your hand on cast, and the recursion is capped at a single card on top of your library rather than a return-to-hand. That deliberate slowness is what stops a flier with evasion and prowess from doubling as a strictly-better tempo threat. It is a creature built to read the rest of your spell count, rewarding a deck already committed to slinging cheap interaction instead of asking you to assemble that deck around it.