|Aqua God Slayer Magic|
Mizu no Metsujin Madoshi
This magic allows a mage, in this case Nao Uzumaki as the name implies to have complete control over water. He is able to use it as offensive and defensive magic. The user of this magic is able to control water around him, but thats not all. It also allows him to use water from his body and also by consuming that same water he is able to recover his energy. The water that is used by user of this magic becomes the heavy water which means that user of, for example Water Dragon Slayer Magic isn't able to consume it. The God who taught Nao this style was Poseidon, the "God of the Sea".