Rigante

4 books
Fierce and proud, the Rigante dwell deep in the green mountain lands, worshiping the gods of air and water, and the spirits of the earth.  Among them lives a warrior who bears the mark of fate. Born of the storm that slew his father, he is Connavar, and tales of his courage spread like wildfire.

The Seidh--a magical race as old as time--take note of the young warrior and cast a malignant shadow across his life. For soon a merciless army will cross the water, destroying forever the timeless rhythms of life among the Rigante.

Swearing to protect his people, Connavar embarks on a quest that will take him into the heart of the enemy. Along the way, he receives a gift: a sword as powerful and deadly as the Seidh who forged it. Thus he receives a name that will strike fear into the hearts of friend and foe alike--a name proclaiming a glorious and bitter destiny . . .

Demonblade.