The Exarchs of Gyllen'Clo
Your party has conquered Undermountain and made their mark on Waterdeep. But the world is full of people who want nothing more than to see you fail so that their own plans may succeed.
Now, a group of adventurers calling themselves the Slayers have declared war on the party. They want to destroy any remains of the legacy of Gyllen’Clo and find a pair of deeply evil artifacts once in the dragon’s possession. Whether they want to or not, our heroes only recourse appears to be destroying their enemies to avenge the dead dragon.