Black Lord of Eagles by Ben Blake
Black Lord of Eagles (The Blessed Land Book 1)
The Ashir thought they were alone in the world – until the strangers came. The invading Thrain have weapons of strange metal, and ride beasts never seen before.
They have come to conquer. Anyone who opposes them is killed. It is soon clear that the Ashir’s only hope lies with one man. Kai, the kamachi, living servant of the Teacher God.
Kai has never heard the voice of his god, as kamachi are supposed to do. He doubts himself, despite the birthmark that names him as the god’s man. But now he must stand up to lead the resistance, against a terrible enemy with no mercy in them.