Hydra is a monster in the class "The Ancients." It is monster #13. Hydra in the 2006 remake had a very different appearance, as it now had a lime green dragon-like body, with 7 purple head stacked vertically on the front. Instead of 10 heads, Hydra now has 7.
0fficial Card Biography
Hydra is a giant swamp creature with a dragon's body and several serpent's heads. When one of the heads is cut off, two more grow back in its place. All of Hydra's heads must be cut off before he's beaten. The stench from the Hydra's breath is enough to kill man or beast.