Board Thread:Antaeus' Arena: Audience Chamber/@comment-1515612-20160831210117/@comment-29701486-20160903090932

In HOH, Percy WAS able to control poison from the Misery goddess and turn it against her. Poison is not water, but it is composed of water to an extent and Percy can control in because it contained water. In the same way, blood contains water and can be controlled by Percy. Hazel may not necessarily know of this power as Percy was in Tartarus at that time.So when the battle starts Percy can just bloodbath her and kill her. Or he can just suffocate her by pushing water against her face.

Extra note - Percy is the MOST powerful demigod of the Seven.