Heroes' Bane is a rare Creature — Hydra card from Journey into Nyx (JOU), collector number 126. Current market price: $0.28 (foil $0.43), TCGplayer market prices via Scryfall.
This creature enters with four +1/+1 counters on it. {2}{G}{G}: Put X +1/+1 counters on this creature, where X is its power.