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"In his house at R'lyeh, dead Cthulhu waits dreaming..." - English translation of Aklo verse

This article is written on a topic within the Greater Cthulhu Mythos based on information from works in the Mythos. By default, all information is to be assumed to derive from the Lovecraft Myth Cycle unless otherwise marked.

*This article or section contains information based on sources in the Expanded Cthulhu Mythos, and not based on H.P. Lovecraft's works directly.

Summanus, Monarch of the Night, Lord of Hell, The Terror that Walketh in Darkness, appears as a grotesque, mouthless humanoid with pale tentacles sticking out from under his robes. He can use these tentacles to siphon blood from his victims.

Summanus had a following in Roman times, but if he is worshiped today, his cult is even more secretive. The rites needed for the proper worship of Summanus are found in the Tuscan Rituals.


Summanus is the creation of Brian Lumley — who based the Great Old One on the Roman deity of the same name — and first appeared in Lumley's short story "What Dark God?" (1975).

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