Clockwork Hydra (DDF) from Duel Decks: Elspeth vs. Tezzeret, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Daren Bader
• Card Text:
  Clockwork Hydra enters the battlefield with four +1/+1 counters on it.
  Whenever Clockwork Hydra attacks or blocks, remove a +1/+1 counter from it. If you do, Clockwork Hydra deals 1 damage to target creature or player.
  T: Put a +1/+1 counter on Clockwork Hydra.