The Midnight Museum is an Expansion Pack in Skylanders: Trap Team. It focuses on the new Dark element, and comes with the Dark Trap Master, Knight Mare, and a Dark Trap.
The Midnight Musuem is a museum of Darkness that exhibits many omnious artifacts, including the prized Dark Eye of Tomorrow. It is guarded by Spyclopters, which will transport the Skylander to the nearest drop area if they are caught. The Dark Doom Raider, Nightshade, threatens to steal the Dark Eye from the heavily guarded museum and use it to steal everything in Skylands.