Arbiter (Underdog, #7)

The skies of the Dark Continent teem with ravening beasts. Thousands of refugees are at the gates of Foreston seeking salvation from a mysterious scourge. The Wastes are infested with herds of bloodthirsty necromorphs that devour every living thing in their path. A Dark Gateway has opened in the Stone Forest, allowing a horde of otherworldly monsters to come flooding through. Adversaries from time immemorial are gathering armies and amassing forces. Ancient enemies are forming alliances. The world of the Great System stands once again on the precipice of change. A new war is coming.