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You, Magnum Innominandum, the signs of the stars nigrarum and bufaniformis Sadoque seal...
~ Part of Ludwig Prinn's ritual to summon Star Vampires.

Ludwig Prinn, alternately spelled Ludvig Prinn, is an antagonist in the Cthulhu Mythos.


Prinn, an "alchemist, necromancer [and] reputed mage", was the purported author of the grimoire De Vermis Mysteriis, translated into English as Mysteries of the Worm. He claimed to have been captured during the Ninth Crusade and to have been taught the dark arts under the wizards of Syria, and there are African legends that speak of his deeds in Egypt.

De Vermis Mysteriis was penned by Prinn around the end of the fifteenth century, and reveals many of his magical secrets. These include the incantation on how to summon familiar spirits, revealed by the Call of Cthulhu RPG to be Star Vampires like the Shambler from the Stars. It also speaks of deities such as "Father Yig, dark Han and serpent-bearded Byatis", which Prinn worshipped as gods of divination. Prinn also claimed knowledge of the being Nyarlathotep and described the barbarism of the pharaoh Nephren-Ka.

Prinn was arrested in Brussels and executed for sorcery after he was found living in a pre-Roman tomb, "amidst a swarm of familiars and fearsomely invoked conjurations." The nearby forest contained pagan alters, and on them were the fresh bloodstains of Prinn's victims.


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Outer Gods
Abhoth | Azathoth | Cxaxukluth | Daoloth | Ghroth | Hydra | Lu-Kthu | Nyarlathotep | Shub-Niggurath | Tulzscha | Ubbo-Sathla | Yhoundeh | Yibb-Tstll | Yog-Sothoth

Great Old Ones
Aphoom Zhah | Baoht Z'uqqa-mogg | Bokrug | Byatis | Crom Cruach | Cthugha | Cthulhu | Cthylla | Cyäegha | Dweller in the Gulf | Eihort | Father Dagon | Ghatanothoa | Gla'aki | Hastur | Mother Hydra | Ithaqua | M'nagalah | Rhan-Tegoth | Rlim Shaikorth | Shaurash-ho | Shudde M'ell | Tsathoggua | The Worm That Gnaws In The Night | Y'golonac | Yig | Ysbaddaden | Ythogtha | Zhar and Lloigor | Zindarak | Zoth-Ommog | Zstylzhemghi | Zvilpogghua

Hostile Species
Deep Ones | Elder Things | Flying Polyps | Ghouls | Hounds of Tindalos | Horsemen of Nyarlathotep | K'n-yanians | Many-Angled Ones | Men of Leng | Mi-gos | Shan | Shoggoths | Tcho-Tcho | Xothians | Zoogs

The Black Brotherhood | Brotherhood of the Beast | Brotherhood of the Black Pharaoh | Brotherhood of the Skin | Brotherhood of the Yellow Sign | Chesuncook Witch Coven | Chorazos Cult | Church of Starry Wisdom | Cthulhu Cult | Cult of the Bloody Tongue | De la Poer Family | Esoteric Order of Dagon | The Slaves of the Flame Undying

Abdul Alhazred | Brown Jenkin | Carl Hill | Colour Out of Space | Crawford Tillinghast | Dr. Howard Ashcroft | Dunwich Horror | Ephraim Waite | George Rogers | George Spencer | Herbert West | High Priest Not To Be Described | Joseph Curwen | Karl Heinrich | Keziah Mason | Lionel Phipps | Ludwig Prinn | Master of the Monolith | Mirdath | Mordred Glendower | Nephren-Ka | Obed Marsh | Old Whateley | Player from Beyond the Void | Robert Marsh | Shambler from the Stars | Taran-Ish | Terrible Old Man | Toad God | Todd Farmer | Walakea | Wilbur Whateley