With the setting of Amonkhet's second sun, Nicol Bolas returns to the plane. But while his loyal followers expect salvation in the coming hours, they are instead treated to damnation as the Elder Dragon's undead servants arise and strike down the living - mortal and god alike. While the survivors scramble to find some hope of escape in the ruins of their city, the Gatewatch races to stop Nicol Bolas' schemes, and put an end to the dragon once and for all.