"The Oracle’s Cave, where Kain’s first fateful meeting with Moebius occurred. Moebius played the role of a doddering soothsayer, stirring his pot of visions while dispensing enigmatic predictions to gullible visitors. Underneath the facade was Moebius the Time Streamer, sorcerer of the Circle of Nine - a ruthless manipulator with the power to bend time. Since his murder at Kain’s hands centuries ago, these caves have stood vacant... though, like Moebius himself, they are rumored to be only a facade for a much larger, more elaborate complex... I sensed that Kain was here... and at that moment, I would have plumbed the depths of hell to find him."
In Blood Omen, shortly after his encounter with Malek in Malek's Bastion, Kain sought a way to defeat the Paladin and was directed by Ariel that the Oracle of Nosgoth (actually Moebius the Time Streamer) might be able to aid him. He entered the Cave and found a maze of caverns with many deadly perils, however he was able to find the Spells 'Stun ' and 'Incapacitate ' and a Blood Fountain to protect him from the snow. Passing through the caves, he eventually entered the Moebius's Museum, and found The Oracle's Chamber, where Moebius awaited. Moebius gave Kain a series of cryptic clues regarding King Ottmar and the Legions of the Nemesis, before advising Kain to seek Vorador in his mansion in the Termogent Forest Swamp, advising Kain to follow the Ignis fatuus to find it.
Raziel also travelled to the Oracle's cave pursuing Kain, on the advise of both Ariel and The Elder God . As Kain had done before him, Raziel fought his way through the Oracle's Cave, now populated with Adult Turelim, through the Empty Moebius' Museum and into the Oracle's Chamber itself where he discovered that The Oracle's cauldron was not only still present, but also still lit. Raziel was able to use the cauldron to unlock a passage into a larger, more elaborate complex, where he not only found a statue of Moebius himself, but several 'portals' which showed Raziel visions of a potential future (which was actually the Original Soul Reaver Storyline.) The passage led to the Chronoplast .