A gate had been unlocked—not indeed the Ultimate Gate, but one leading from earth and time to that extension of earth which is outside time, and from which in turn the Ultimate Gate leads fearsomely and perilously to the Last Void which is outside all earths, all universes, and all matter.
~ HPL , "Through the Gates of the Silver Key"

Lovecraft circle Seal The Ultimate Gate is a gateway through beyond and outside all of space and time. It is guarded by 'Umr At-Tawil, as well as Yog-Sothoth, and can be accessed through the use of the Silver Key. Among other things, it allows one access to all of the possible lives one may live or have lived; for example, Randolph Carter was able to enter the mind and body of Zkauba, an alien mystic who existed along a divergent spatial and temporal continuity from Carter's own existence. (HPL: "Through the Gates of the Silver Key")

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