Rawn Chronicles Book One: The Orrinn and the Blacksword.

"You said to me you had to follow a path of destiny," said Powyss. "That's right." The prince frowned. "Well, the path that you have followed has already been foretold. You, Havoc, have taken the steps that were set in a prophecy five hundred years ago, the Prophecy of the Blacksword. What you have in your hands is the Sword that Rules." The once peaceful island continent of Tattoium/Tarridun is in turmoil. Civil war spreads and the evil tyrant, King Kasan of the Vallkytes, has usurped the Rogun king and sent his people into exile. Havoc De Proteous Cromme, Crown Prince of the Roguns and apprentice in the Rawn Arts, has made a promise to right the wrongs his people have suffered at the hands of their enemies. However, he is cursed with a terrible power and an inner burning that pushes him towards the brink of madness and can unleash destruction beyond his control.