User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-3146930-20130611215552/@comment-6064271-20130613003051

that actually makes sense, the oath to final breath would be Annabeths promise on the River Styx bout keeping Percy safe, Mars told Frank that he would need to help Percy make a decision involving his fatal flaw, to choose to save his friends or the world. So i may go back to a former theory I had, Percy would want to stay but Annabeth will tell him not to since he is stronger and will be more of use to the rest of the 6, maybe frank helps Annabeth convince Percy to leave her there and he does just that while regretting it. Then he will feel really bad bout it and he will have an emotional breakdown that may mess up the quest but he will get it back together in time to save the world and maybe save Annabeth. At least that was the theory I had bout a month ago. Good Job in noticing that.