Hydras are gigantic five-headed aquatic creatures with blue scales and yellow eyes. They have the highest base strength and base attack among the basic monsters in the game. They are at their strongest when they are battling at sea since they can move around very quickly and easily recover their HP every turn. They are unable to move around as freely on land. They are mostly used to guard castles because of this. Their mouths can spray a deadly icy breath that damages everything in front of it. Their attacks do extra damage to beings with the Red Element, unfortunately they are not very accurate. In Grand Edition, they lose the ability to recover their HP every turn on water. They cost 460 mana to summon.