So, I was re-reading the Last Olympian, when this line came:
"I am immortal, all-powerful! I would not help the other gods if they begged me, if Percy Jackson himself pleaded-"
Just read guys. Hades is seriously thinking Percy is as great,if not greater, than the gods(we all know is some-what true). Whatever point Hades was trying to get, he just admitted he thought Percy was really powerful.
Yeah, that’s it. All I wanted to say.