The Special Zone, originally known as the Zone of Silence (and sometimes referred to as The Void), was created or discovered by the wizard Ixis Naugus. Its properties were much different than that of Mobius Prime's, and Naugus was able to control it entirely, even merging it together with the true Void. The Zone of Silence had long acted as a prison zone used by Dr. Ivo Robotnik after his successful takeover of the Kingdom of Acorn. Its most notable prisoners include King Maximillian Acorn, the Original Freedom Fighters, former Warlord Kodos, Uma Arachnis and Feist. In 3237, the Zone of Silence became home to all of the Chaos Emeralds in the universe when the Chosen One fulfilled the Ancient Walkers' prophecy and caused The Great Harmony. It has since been referred to as the "Special Zone.