Resounding Roar is a common Instant card from Shards of Alara (ALA), collector number 144. Current market price: $0.10 (foil $0.29), TCGplayer market prices via Scryfall.
Target creature gets +3/+3 until end of turn. Cycling {5}{R}{G}{W} ({5}{R}{G}{W}, Discard this card: Draw a card.) When you cycle this card, target creature gets +6/+6 until end of turn.