The Arcanum Tripartitus was an ancient stone cylinder roll associated with the Magnopotamoi, three Nephilim giants of an order deified by the Cult of Mithras.
History[]
In the 1st century AD, three representatives of a tribe of Nephilim giants arrived in Imperial Rome: Abgal, Gibborim and their leader Junia.[1] The order formed a clandestine alliance with the nascent Christian Church under Saint Peter, whose goal was to collect all the seventeen ancient stone relics related to the Great Circle.[2] For reasons lost to history, Abgal broke off from his brethren and instead, whether by choice or coercion, took up the life of a gladiator and became Emperor Nero's unbeatable champion. His features hidden behind a bull-shaped helmet, he became famous as "Abgal the Minotaur", the "Monster of Crete" who convalesced in a chamber below the land upon which the Colosseum was built.[1]
At some point, the Cult of Mithras–a competing religion–having learned of the original trio of large visitors, took to worshipping them as the Magnopotamoi, grander Roman equivalents of the Greek river gods. The three-meter-tall seemingly unstoppable Abgal, appearing like a bull, became associated with the sacred animal that Mithras once slayed. His resting place, sealed behind the "Monster's Gate", was locked with a stone cylinder depicting the Magnopotamoi called the Arcanum Tripartitus.[1]
When Junia and Gibborim proved to be mortal and with the Nephilim Order keen to protect the secrecy of their origin from the world, the Arcanum Tripartitus was split in three. Two of the pieces were interred with the respective tombs of Junia and Gibborim but the representation of Abgal, still alive in his chamber beneath the Colosseum centuries after his public appearances in Rome, was instead hidden within an elaborate shrine depicting his prowess in battle as Nero's favorite though Abgal's statue would get decapitated to ensure his anonymity. By the 20th century, what knowledge had existed of the Mithras cult and the Nephilim had been reduced to scattered fragments.[1]

