This is the story

Young hunter, Jacob Wildleaf, discovers that a strange, invisible power called magic is leeching into the kingdom. It gives him a power he’d never seen before, but the devastating effects become apparent when magic’s lingering traces cause the deaths in his village. Knowing it will claim his life to, guilt and anger push him to find a cure.

That means finding a man that holds the knowledge of the origins of magic. That man, Jacob’s real father. But Dreygon Halcia, a cold, cruel Regent believed to have murdered the previous King, sends his soldiers to purge all traces of what he sees as an infection. Jacob must help an ex-General and a Princess remove Dreygon from the throne before the lives unwittingly connected to magic are extinguished.