Board Thread:Antaeus' Arena: Audience Chamber/@comment-1515612-20150930233157/@comment-5471249-20160207132918

No, I'm not really privy to any undisclosed information, haha, I was just referring to the time that Percy cleaned Geryon's stables by causing petrified sea shells to generate seawater, and the effort of doing so is said to drain him quite a bit.

As for Jason... See, you cannot just assume that it takes a toll on Jason if it is not explicitly said so - absence of evidence is not evidence of absence, after all! As such, Jason's aerokinesis abilities gradually improve throughout the series, with him able to knock down 12-ft-tall Otis with a powerful gust of wind in "The Mark of Athena", and in "The Blood of Olympus", he generated a much stronger wind, strong enough to send the 40-ft-tall Porphyrion himself flying, and in neither instance does it seem to take any toll on Jason, with him continuing to fight and function just as well afterwards. He could therefore, conceivably kill Percy in this manner, launching him high into the air, with Percy fatally hurting himself from the impact of falling down.