Shadow Temple is an ancient temple inside the middle of the Spectral Realm (it appears as a large pyramid on the outside in the level, Spectral Zenith) It seems to have a peculiar ceiling that is clouds with lightning. In the middle of the temple is the source of all spectral energy, stored in a giant pyramid. It happens to be home to a few Ancient Defenders. Pac-Man battled Erwin & Erwin was defeated here. Orson claimed that if the temple fell with the realm, it would be where the paradox would spark & consume the remainder of the realm.