Kalonian Hydra is a mythic Creature — Hydra card from Magic 2014 (M14), collector number 181. Current market price: $6.67 (foil $57.07), TCGplayer market prices via Scryfall.
Trample This creature enters with four +1/+1 counters on it. Whenever this creature attacks, double the number of +1/+1 counters on each creature you control.