Board Thread:Antaeus' Arena: Audience Chamber/@comment-1515612-20160831210117/@comment-29377413-20160901191004

No, he first did it in the titans curse. When the skeletons attacked, one shot a gun at him and Percy deflected it easily. Due to his reaction, I think it was the first time he did it. He was also seen in the Son of Neptune deflecting both bullets AND arrows at the same time. Percy didn't need the Curse of Achilles, because he could already do that.