Feral Hydra [Archenemy]

Set: Archenemy Type: Creature — Hydra Beast Rare Cost: {X}{G} Feral Hydra enters the battlefield with X +1/+1 counters on it. {3}: Put a +1/+1 counter on Feral Hydra. Any player may activate this ability. It shreds its prey as each head fights for the choicest bits.