Beyond Ragnarok: The Renshai Chronicles, Volume One

And what hope was there for mere humans when Odin, the leader of the gods, was himself doomed to die in the upcoming battle? Yet Odin had long planned to cheat his fate. His chosen weapon to slay his nemesis, Fenris Wolf, was the demigod Colbey Calistinsson, the son of Thor and the last true survivor of the warrior race known as the Renshai. But Colbey had loyalties far older and stronger than those he owed to the gods. He, too, was determined to change the foreordained path of the future - though Colbey's success would seal Odin's doom.
The Renshai's triumph was not, however, without its price, and now, nearly three hundred years after the time of Ragnarok, humankind was about to face a new and perhaps fatal trial. For though the balance between Law and Chaos had long been maintained by the rulers of Bearn, the current king was dying and a new keeper of neutrality must be found from among his heirs. Yet some unidentified enemy seemed bent on destroying all who stood in line to the throne. At the urging of his prime minister, King Kohleran was forced to make an unprecedented decision. Any with a claim to the throne, however distant, must take the Test of the Staves. None but those who had faced it knew what this ordeal was. All they were certain of was that the Staff of Law and the Staff of Chaos would together judge their right to rule.