Slayer of the Dead by Tom Atwood Jr.

The Kingdom of Melora is on the verge of civil war as rioting mages clash with zealous Templars. Erik Wynnson dreams of escape, of becoming a mercenary and carving out his own future. Instead, a forbidden ritual unleashes an ancient Nightmare upon his village and awakens a raw, uncontrollable magic within him.To survive, Erik must master this dangerous power under the guidance of Bowen, a mysterious Druid who reveals a hidden world of elemental magic and legendary monster hunters. But when the resurrected vampire lord Kerrigan rises with an army of the dead, Erik’s path collides with the kingdom’s secret war.Now, he must decide whether to sacrifice his soul or rise as the Slayer of the Dead, the last hope against eternal night.