Alföðr Prophecy

The Alföðr Prophecy, also known as the Alföðr Spá, the All-Father Prophecy, or simply the Tale of the Crowborn, is an ancient Norse prophecy made by a viking son of Odin, who foretold the coming of the Crowborn -- a mortal child of Odin with the power to save Valhalla from an unknown enemy.

It was given by a Norse son of Odin back in the Viking Era, and the original text was long ago lost to the time. What's known for sure is that the prophecy tells about a demigod of Odin born with the gift of prophecy who will bring about a great revolution by defeating an unknown and very powerful enemy of Valhalla. Some people believe the Alföðr Prophecy to be foretelling the Ragnarök, since both culminate with an enemy of the gods being defeated and a revolution happening.

Supposed Crowborns
Among the ages, many tried to explain the prophecy. It's only natural that many were born and believed to be the Crowborn. They are:
 * Harvok Gold-Fist (deceased, einherji)
 * Gunnar (deceased, einherji)
 * Icarus, the Mad (deceased)
 * Father Samwell (deceased)
 * Bianca LeHaffner (deceased, einherji)
 * Arthur Eriksson

Trivia

 * Although the prophecy text is lost to the time, it's perfectly possible that Odin knows it since the prophecy was given by one of his children. It's also possible that the one who foretold it could still know the text, since he could be an einherji of Valhalla.
 * It's never said that one must be alive to be the Crowborn, or even be a man. Bianca LeHaeffner, Grand Master Marcus' only sister, was the only woman among the children of Odin who was believed to be the chosen one, though she didn't have the gift of prophecy.
 * Arthur Eriksson is the only known demigod of Odin to be born with the gift of prophecy. Harkon Gold-Fist, another son of the All-Father and formerly believed to be the Crowborn, believes him to be the one whose coming is foretold by the Alföðr Prophecy.