Rite of the Blood Moon
The Blood Moon is a great and blasphemous ritual uncovered by Thuul-Sogoth to plunge the world into the Shadowfell under his command and cut it off from the gods. In such a state, the Arch-Lich’s power would be unmatched and he would ascend to godhood himself to lord as Necromancer-King over all the world.
The Blood Moon can only occur once a month on the night of the full moon. Each time it does so it brings the world closer to the Shadowfell, with culminating deleterious effect. Should it rise three months in a row, the ritual will be complete and the world will be lost to a reign of darkness.
First Blood Moon: Fall weather, illumination reduced 1 level, global desecrate effect
Third Blood Moon: Reign of Darkness