Rabbit Response is a common Instant card from Bloomburrow (BLB), collector number 26. Current market price: $0.22 (foil $0.31), TCGplayer market prices via Scryfall.
Creatures you control get +2/+1 until end of turn. If you control a Rabbit, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)