Undead Inheritance. Shadows of the First Trine, #4

As the Sacred Land regenerates, ancient evils rise from death itself... Dorenn Adair's quest has brought him to the precipice of his greatest challenge yet. With the essence of the wielder Toborne merged with his own, dark whispers plague his mind even as he races to unite the fractured kingdoms of Trigothia against a growing threat. The Oracle, Kambor, has awakened in the rejuvenating Sacred Land, marshaling his forces of Dramyds and Drasmyd Duil.
But a more sinister power emerges from the shadows-Naneden the Mad has transformed into a lich of terrifying power, raising an army of the undead that threatens to engulf the world. As Dorenn's companions scatter across the realm-some hunting the corrupted Kimala, others facing the horrors of undeath in the Sacred Land-time is running short. Wielders and Mindwielders alike find their powers tested against forces not seen for a millennium.
The dead are walking. The Oracle has returned. And the fate of Rennirus hangs in the balance.