Stormrider: The Rigante Book 4 - David Gemmell SB

Centuries after Connavar's triumphant battles against the invading army of Stone gained the Rigante their freedom, the clan finds itself oppressed once again. Magic that once flourished has been all but snuffed out. The Varlish king and his barons have stolen Rigante lands and robbed the people of their culture and liberty. From the Rigante's former seat of power the black-hearted Moidart rules; only in the north are the clansmen free. There, in the Druagh mountains, the magic still reigns, strengthened by bold, brilliant victories of the outlaw leader known as Ravenheart. In the south, civil war has drenched the land in blood, and the armies of destruction are slowly creeping north where Ravenheart waits, believing the armies of hated Moidart will come, led by the brutal ruler's only son, Stormrider. Both Ravenheart and Stormrider are destined to be heroes, but one of them is doomed. But these are not ordinary men. They are clansmen, and more than that, they are Rigante.