Board Thread:Antaeus' Arena: Audience Chamber/@comment-1515612-20150821065646/@comment-1515612-20150829042515

Percy ended up controlling poison in whatsherface's body thus people thinking that he was blood-bending in The House of Hades. So yes, everyone got it from ATLA.

I mean the human body does have water so it makes sense why you should be able to control it.