Blood Above, Blood Below

Blood Above, Blood Below, designed by Will Doyle, is an adventure module set in the Forgotten Realms using the Dungeons & Dragons 5th-edition ruleset. It was designed to be played by three different parties of adventurers at the same time, each with their own objectives but with the success of all of them together determining the final outcome. "In two different arenas, the call for blood has been sounded. The five factions now seek out bold adventurers willing to brave death in order to draw attention away from Szith Morcane, and in so doing allow a small group to infiltrate the drow outpost and return it to the hands of the drow. What role will you play in this deadly game? A special three-hour multitable adventure for 1st-16th level characters."

Summary
As two mass combats play out at the same time, a trio of powerful incubi, called the Crimson Trinity attempt to channel the souls of those who die to their master, Graz'zt, in the hopes of giving him enough power to begin a conquest of Toril. Drow refugees from Szith Morcane have warned the Emerald Enclave, Harpers, Lords' Alliance, Order of the Gauntlet and Zhentarim of the plot, and each faction together sends hundreds of their most able agents in secret to foil the plot.