Munchkin Marvel 2: Mystic Mayhem

"Munchkin Marvel 2: Mystic Mayhem, an expansion for Munchkin Marvel, lets players journey into mystery with Doctor Strange and The Defenders as they fight villains like the evil Baron Mordo and the Dread Dormammu. This expansion includes new Doors and Treasures as well as twelve oversized Dungeon cards that introduce powerful new threats and Allies and add a new level of mayhem and madness to the game."
 
This is not a standalone game, requires a base game of Munchkin to play (best with Munhckin Marvel).