The Long Hunt by Freysson, Eli

The war for the galactic fringe is at a turning point.A dark sorcerer is poised to tip it in the wrong direction.And only Saketa can stop him.She has hunted this ancestral enemy far and wide across the space lanes, and finally he is within reach. But her own mystical powers are diminished ever since an assault on her homeworld, and obsession is making her reckless.Saketa has a cheap sword, a smidgen of power, and her two fists. Her foe has a fanatical cult, a network of allies, and dreadful magics. The long hunt will end in the fires of war.