Absolution (Montague & Strong, #33)

When you gaze long into the abyss, the abyss also gazes into you.

Tristan Montague has been under the influence of the corrupted White Heart power with only one solution to bring him back from plunging into complete darkness.
A forbidden cast, named Absolution—a cast that can undo the hold of the dark flame over Monty must be cast.

There is only one complication.

The artifact containing Absolution is located in the Shades, a plane controlled by the Circle of Dusk. In order to access the artifact, Monty and Simon will need a guide. A necromancer willing to risk everything to take them to the Shades.

Now, together with Simon, they must find a powerful necromancer, activate the artifact, purge the corrupted power of the White Heart and survive the Circle of Dusk.

If they fail, Monty will fall into complete darkness.