User blog comment:Hermione Chase/"The Blood of Olympus" Expectations/@comment-24038428-20131011142336

I think I know what "An oath to keep with a final breath" will mean:

The oath to keep obviously is Leo's promise to Calypso, but I think the "final breath" thing is Frank's wood.

Remember when Leo gave that little bag to Frank keep his wood? That little bag was made by Calypso, representing Leo's promise.

And it was said that when Frank's wood burned for good, he would have it in his hands.