Forbidden Zone

The forbidden zone is a large and imposing structure that only appears on certain occasions in random locations. It's the home of Lazar and is protected by The Guardian. Only those with hearts of pure evil can enter safely. Anyone with a good heart is forced to fare against a series of deadly traps; an entrance that tries to smash, various booby traps such as slicers, flamethrowers and tools meant to crush and other such obstacles.

After being visited once by Dr. Robotnik and Sonic and accidentally waking Lazar, the forbidden zone has since vanished again.