User blog comment:Menara/The Mark of Athena Character Art Revealed!/@comment-4611874-20120827041812/@comment-3146930-20120828014714

Percy didn't do anything and Nemesis most likely knew he would die. She took his eye because it was payment for getting the inor gods respect. Ethan turned against Kronos of his own free will, stabbed Kronos, his sword broke and one of the pieces shot back and injured him, and Kronos tossed him off Olympus to his death, which gave Percy and Annabeth enough to to get through to Luke and Luke killed himself, thus bringing respect to the minor gods as a result of Percy's wish