Arcturia and the Shadowdusks (Halaster's apprentices) are tired of his madness and are plotting to "modernize" Undermountain and use it to invade Waterdeep.
The party is recruited by a concerned noble or a hidden faction within the City Watch.
The players aren't just exploring; they are surgical strikers sent to eliminate key lieutenants to prevent a surface-world apocalypse. 3. Character-Driven "Personal Lures" WDotMM.rar
Halaster has grown bored over the millennia and has invited "contestants" from across the planes.
Every few levels, the party encounters "scrying eyes" (magical cameras). Halaster provides comedic commentary, offers "prizes" for entertaining combat, and creates "commercial breaks" where the party is briefly safe but must endure his rambling. Halaster provides comedic commentary
To give a cohesive story beyond a simple crawl, you should focus on Halaster Blackcloak as an active, eccentric director rather than just a final boss. 1. The "Interdimensional Game Show" Hook
Instead of one big plot, tie each floor to a player's specific backstory. offers "prizes" for entertaining combat
Alternate plot hooks for PC's for DoMM? : r/DungeonoftheMadMage