The society of the Legion of Dusk is built around the rites and devotion of a powerful church, led by undead paladins who sustain themselves on the blood of their enemies. After seven hundred years of war that saw them march across the entirety of their home continent, the vampires of the Legion have come to add Ixalan to their territory. Certain leaders among them also seek the Immortal Sun, which is dimly remembered in their own legends as a source of true immortality—eternal life, in contrast to the endless undeath they now endure.