Artifact Creature — Hydra

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.

Artist(s): Daren Bader