What is the prophecy from the Son of Neptune?

Answer 1

Mars/Ares in Roman form said: Go to Alaska.

Find Thanatos and free him.

Come back by sundown on June twenty-fourth or die.

Then Ella the Harpy said later in the book:

To the north, beyond the gods, lies the legion's crown.

Falling from ice, the son of Neptune shall drown.

Hope this helped!

Answer 2

In "The Son of Neptune" by Rick Riordan, the prophecy states: "To storm or fire, the world must fall. An oath to keep with a final breath, And foes bear arms to the Doors of Death." This prophecy sets the stage for the events that unfold in the book.