The Awaited One: Sojourn Trilogy: Book 3 — Robert P. Fitton

Loftus meets the seer, Zuni, and is hailed as the awaited savior of the Mantari people. He must first overcome the despotic Tolten; now Kath's husband. Sard brings his entire fleet through the intergalactic passageway to destroy the Mantari. As predicted in the Saba, the ancient writings, over an isolated asteroid, Loftus, the Awaited One, faces Sard in the final battle.