Cadaverous Crypt is the second Undead level in Skylanders: Spyro's Adventure, where the Skylanders go to get the Skeleton Key. Though T-Bone tries to guide them, they are separated from him just as they arrive and need to traverse its ever shifting halls on their own.
In the same room as the Story Scroll, there is a skeleton that resembles Spyro.
Despite sharing the name, there is a different golden Skeleton Key in the 3DS version of Skylanders: Swap Force. It has a golden skull as a handle and resides in the Samurai Islands, and can open every door in Skylands.
Both instances of this level appearing outside of the games, in Return of the Dragon King and the TV show, incorrectly pluralize the location's name. Both also greatly change its appearance, as either a dark labirynthe cave or a wasteland.
