Dark Priest — P.M. Griffin

Sequel to The Elven King
Lorcan, the Elven King, Sirona Carey, his queen, and their comrades former ghost Aidan, and the leprechaun Tun hasten to investigate and thwart an in incursion of the Dark Host on a continent of the world Terrastis.

The four begin with almost no information about the peril they face, because the commander of their forces on Terrastis had in a gross error of judgment withdrawn all his troops from the affected continent a year previously, but by dint of reasoning plus their knowledge of the area itself and of their foes, they soon realize they are in the midst of a terrifying crisis.

Their enemies' plan is almost complete, and there is no time in which to summon aid. The Elven King and his companions must set themselves against and defeat the human members of a Dark coven plus undead monsters, giant rodents, and a seemingly demoniac high priest to stop the sacrifice that will initiate the annihilation of life on Terrastis. It is a seemingly hopeless task for four soldiers to accomplish, but they have no alternative but to move ahead with their attack.