The Portal originally and forever known as the Celestial Portal featured in Mortal Kombat: Deadly Alliance is said to be known only to sorcerers and deities, this ancient waystation is located in Outworld and transports its users to Earthrealm. It is forever watched over by two floating statue heads of old Asian sages. To earn the right to pass, however, one must face and defeat a representation of his or her most powerful adversary. Holding by the four support pillars of the Celestial Portal is a Portal Sphere.
It can only be accessed by sorcerers and the gods, especially the Elder Gods. The Deadly Alliance used this portal to get to Earthrealm in order to murder Liu Kang, after they apparently killed Shao Kahn, and then with Mavado to get back to Outworld. Raiden then used it to bring his chosen warriors to Outworld to fight the Deadly Alliance.