Undermountain is the lair of the insane wizard Halaster Blackcloak who descended into madness as he dug deeper under the city of Waterdeep and expanded his domain. Many creatures overpowered by Blackcloak are contained in different levels of his lair along with multiple portals to other parts of the Forgotten Realms and the multiverse . Adventurers set off on an subterranean dungeon crawl that starts in the Yawning Portal tavern and explores twenty-three levels of Undermountain and the refuge of Skullport (which is both a connection to the seedier side of Waterdeep and to the Underdark ). This is the first official published adventure with content intended for “tier four” (levels 17-20) in 5e Im not looking for a experience DM if your still learning that's fine i have to module already i can find players to play. i want to try to hold it on Friday or Saturday nights what ever is better for you as a DM