Feral Hydra is a rare Creature — Hydra Beast card from Shards of Alara (ALA), collector number 131. Current market price: $0.39 (foil $2.29), TCGplayer market prices via Scryfall.
This creature enters with X +1/+1 counters on it. {3}: Put a +1/+1 counter on this creature. Any player may activate this ability.