Cloudfin Raptor is a common Creature — Bird Mutant card from Gatecrash (GTC), collector number 32. Current market price: $0.19 (foil $0.81), TCGplayer market prices via Scryfall.
Flying Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)