Hellucinatory / Rituale Plus Ultra Inferis or the Retrognosis Mass

The Hellucinatory is housed within the Abyssilica on SAA/5W/W.  Using technology based on that of the Delirium Forge, the Hellucinatory differs in that it is classed as a ←nacht/maschine↓, (commonly referred to as Infernals or Ultos (Ultra/Omegas, or +Ω)).  This class of machine is used exclusively in Opposition Theology or Severance/Re-Birthing Rituals. The rites involving the Hellucinatory are based on the archaic Eleusian and Mithraic rites of spiritual purification through fear, pain, disremembrance, and symbolic re-birth.
A passage from the Akkordance or Liber Pro Irae Viruum (Defilio 4:234-278) is read by the officiating Vikar Apostatik as the supplicant undergoes the Ritus Pro Maculo or Ritual of Self-Debasement in the Debasing Pool followed by the Ceremonia Adversus or Anathematism by submersion in the Sanguinarium (Blood Fount).

View of a portion of the Hellucinatory

Next is the Abasement of the Host performed by the Vikar and his Akolyte, during which the supplicant consumes the Crustulum Excreta Sanctus and Menstruum Mortiae. Upon consummation of the Host, the supplicant’s eyes are covered with an Occlusion Swathe, made from the skin of a sacrificed Nihilae, as representing his blind groping for spiritual truth.  Once blinded, a Volute, or flesh screw, is used to anchor the supplicant’s tongue to the hard palate, and his lips are sewn together tightly by an Cenobitum Vultus using a Mordant, or bone-needle and Funiculum Viscus, or sutures, made from the gut of sacrificed Nihilae.  This is symbolic for the end of weak and vain pleading and prayer to disinterested gods.
Finally, before beginning the ordeal of the Hellucinatory, the supplicant is fitted with two Camur Pro Viscuum -flesh hooks- in the area of the shoulder-blades.  To these hooks are attached Insistuum - heavy gauge chains - binding two Nihili who have their legs unfettered as the supplicant enters the chamber.  This is symbolic of the pull of fear and worldly attachment that will prevent ultimate freedom if the supplicant is not strong and determined enough to resist.
This done, the supplicant is encouraged by the lusty application of a scourge or Caro Plasmator (literally “Meat Maker”) to begin the re-birthing process. Blinded, mute and with forward progress made difficult by the Nihili, the supplicant must grope his way through the Hellucinatory chamber.  To further discourage those not fully committed to re-birth into the Fraternitas Lucis Niger, the floor of the Hellucinatory is made awash with several inches of blood, thus becoming extremely slippery and difficult to navigate.  The walls are also run with blood, via a number of small tunnels hidden in the topmost recesses. 
Unknown to the supplicant, the Crustulum that was ingested contained a mixture of offal, feces, and dried menstrual blood plus a heavy dose of Pseudoveritum Ecstasis that had been chemically altered to cause violent headache and nausea in addition to vivid visual and auditory hallucinations.  The ritual is timed carefully so that the PE takes effect soon after the supplicant enters the Hellucinatory.
Cenobites carefully hidden within recessed areas of the Hellucinatory assault the supplicant with violent screams and nightmarish howls, amplified electronically to painfully high decibel levels. As the supplicant passes certain way points, more cenobites hurl large portions of steaming viscera and flesh at him to further his confusion and distress.
If the supplicant perseveres, he is confronted by the final obstacle. At the end of the Hellucinatory chamber he encounters the Anus Mundi.  This is a solid wall of viscera, bone and rotting flesh blocking the entire width and height of the chamber.  To pass through, the supplicant must find the small Re-Birth Canal.  Once found, he must struggle into it, smearing himself with blood to make passage possible.  The passage itself is created from Elasticine Biomedical Flesh Replacement Material designed to mimic a human sphincter.
 Thus, once ingress is achieved, the supplicant winds his way through the passage.  By design, the Re-Birth canal was created to be suffocatingly tight in order that the supplicant must struggle not against pain and weariness only, but against the loss of relative location, claustrophobia and an increasingly airless atmosphere as well.
Upon exgression of the canal, which empties into the nave of the Red Chapel, waiting cenobites remove the Viscuum and hold the supplicant erect, all to cries of “In Nomine Nihilo! Ave, Excreta! Ave, Excreta!” The canal is then sealed behind him, leaving the Nihil to suffocate. When able to stand under his own power, the supplicant is ritually cleansed by Les Eaux du Paradis, or a shower of urine from the cenobites gathered to witness his ceremonial Re-Birth.
At last, the supplicant has the Occlusion Swathe, Finuculum Viscum, and Volute removed.   He is made to kneel at the left hand of the ranking Legate of the Order who pronounces the dissolution of the supplicant's former name.  The Legate re-names the supplicant, basing the Nom de Renaissance on formulæ derived from FLN scriptural texts and a prescribed list of Anathemic Names*. Upon acknowledgement of the new name, the supplicant is impressed on the left arm with the indelible Severance Device (represented by the hereditary Arms of the FLN: a Shield Party Per Pale Azure Sinister, Argent Dexter, Blazoned Sinister by a Main Mailed grasping a broken thunderbolt Bendways Jules and Crowned with three Stars Argent Estoile  - significant of mans’ ascension to deific knowledge and the mastery of false gods -  Further Blazoned Dexter by a Maiden's Head with six Bezants d'Or Arrondie,- symbolic of the libertine pleasures of natural instinct - Banded Heart and Hombrel Argent within which the motto AS GOD BY REASON / AS GOD BY WILL writ Azure Arrondie).
This done in recognition of the achievement, through strength of will, of the complete separation from false dogma and rebirth as a Lightbearer or Spectracide.

*The antenomen “Frater” additioned by a given name derived by arcane formulæ.  The FLN honors an ancient interdict on the bestowing of surnames.