Pet Avengers is a common Creature — Dragon Cat Dog Bird Frog Hero card from Marvel Super Heroes (MSH), collector number 178. Current market price: $0.25 (foil $0.27), TCGplayer market prices via Scryfall.
Reach Power-up — {6}{G}: Put a +1/+1 counter on this creature and create a 3/2 white Hero creature token with vigilance. (Activate each power-up ability only once. Reduce the cost by its mana cost if it entered this turn.)