九头蛇周: 九头蛇产量加倍.Week of Hydra: Double growth for Hydra and Chao Hydras.九头蛇周: 九头蛇产量更加.Week of Hydra: Double growth for Hydras and Chaos Hydras.九头蛇 - 对强敌的征服.Hydra - The conquest of a very powerful enemy....