Pollywog Prodigy is a rare Creature — Frog Wizard card from Bloomburrow Commander (BLC), collector number 50. Current market price: $8.29, TCGplayer market prices via Scryfall.
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.) Whenever an opponent casts a noncreature spell with mana value less than this creature's power, draw a card.