The universe is on the edge of destruction-Baba Yaga and the Faceless Woman's plan is coming to fruition-Skye Mathers and her allies are all that stand in the way of our world blinking out of existence-but somehow, something even more sinister is creeping through the chaos, and all who fall in its shadow may not survive! Don't miss this climactic battle for all of reality in the ultimate finale to the Rise of Cthulhu saga of the Grimm Universe!