Wildwood Scourge is a uncommon Creature — Hydra card from Foundations (FDN), collector number 236. Current market price: $0.24 (foil $0.32), TCGplayer market prices via Scryfall.
This creature enters with X +1/+1 counters on it. Whenever one or more +1/+1 counters are put on another non-Hydra creature you control, put a +1/+1 counter on this creature.