The Dark Servant

For three thousand years, the dark servants of the Lord of Night have waged war against the monstrous armies of the Unmaker. An ancient prophecy gives them hope of eventual victory, but the Unmaker will stop at nothing to ensure the prophecy never comes to pass. Cursed with the rare gift of foresight, High Priest S'Rak is duty bound to defend and preserve the Victory Prophecy by any means necessary—and at any cost.

This is an on-going saga: each book may not have and HEA/HFN, but the series culminates with an HEA/HFN in the final book.