Liminal Bridges Content . Transliminal passage of quickened objects or entities without the persistent agency of hyperagonal media is not possible , and even if possible , would result in instantaneous retromission of the transported referents . Only a transpontine circumpenetration of the limen will result in transits of greater than infinitessimal duration . Though other hyperagonal media may exist in theory , the only known transliminal artifact capable of sustained transpontine circumpenetration is the Sigil stone . A sigil stone is a specimen of pre - Mythic quasi - crystalline morpholith that has been transformed into an extra - dimensional artifact through the arcane inscription of a daedric sigil . Though some common morpholiths like soul gems may be found in nature , the exotic morpoliths used to make sigil stones occur only in pocket voids of Oblivion , and cannot be prospected or harvested without daedric assistance . Therefore , since both the morpholiths and the daedric sigils required for hyperagonal media cannot be obtained without traffic and commerce with Daedra Lords , it is necessary that a transliminal mechanic cultivate a working knowledge of conjuration — though purpose - built enchantments may be substituted if the mechanic has sufficient invocatory skill . Traffic and commerce with Daedra Lords is an esoteric but well - established practice , and lies outside the compass of this treatise . [ 1 ] Presuming a sigil stone has been acquired , the transliminal mechanic must first prepare the morpholith to receive the daedric sigil . Let the mechanic prepare a chamber , sealed against all daylight and disturbances of the outer air , roofed and walled with white stone and floored with black tiles . All surfaces of this chamber must be ritually purified with a solution of void salts in ether solvent . A foursquare table shall be placed in the center of the room , with a dish to receive the morpholith . Four censers shall be prepared with incense compounded from gorvix and harrada . On the equinox , the mechanic shall then place the morpolith in the dish and intone the rites of the Book of Law , beginning at dawn and continuing without cease until the sunset of the same day . The mechanic may then present the purified morpholith to the Daedra Lord for his inscription . Once inscribed with the Daedra Lord ' s sigil , the morpholith becomes a true sigil stone , a powerful artifact that collects and stores arcane power — similar in many respects to a charged soul gem , but of a much greater magnitude . And it is this sigil stone that is required to provide the tremendous arcane power necessary to sustain the enchantment that supports the transpontine circumpenetration of the limen . To open a gate to Oblivion , the mechanic must communicate directly , by spell or enchantment , with the Daedra Lord who inscribed the sigil stone in question . The Daedra Lord and the mechanic jointly invoke the conjurational charter [ 2 ] , and the mechanic activates the charged sigil stone , which is immediately transported through the liminal barrier to the spot where its sigil was inscribed , thus opening a temporary portal between Mundus and Oblivion . This portal may only remain open for a brief period of time , depending on the strength of the liminal barrier at the chosen spots , several minutes being the longest ever reported , so the usefulness of such a gate is quite limited . [ 1 ] Interested students are invited to consult the works of Albrecht Theophannes Bombidius and Galerion The Mystic for the fundaments of this discipline . [ 2 ] Recommended examples of the conjurational charter may be found in Therion ' s Book of Most Arcane Covenants or Ralliballah ' s Eleven Ritual Forms .