The upcoming adventure Princes of the Apocalypse has it's major villains in the form of the Elemental Prophets who are each creating a Temple to their Element. Chris Perkins has shared some details about the four prophets. Starting with their names. Aerisi Kalinoth the Air Prophet, Marlos Urnrayle the Earth Prophet, Vanifer the Fire Prophet, and Gar Shatterkeel the water prophet. Each possessing a weapon empowered by one of the 4 Princes of Elemental Evil Note: Spoilers for some details of the adventure. "Each used to be someone else." creating more mysteries about them. I will update this thread with more info on the prophets as it becomes known. For now speculation is the most we can do for the four.