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Titles The Serpent
Source of Lies
Wild Beast
Lord of the Fifth
Realm Drowned Empire, Stygia, Hell
Alignment Lawful evil
Areas of Concern Forbidden Lore
Cleric Alignments (1E)
Domains (1E) Evil, Law, Strength, Water
Subdomains (1E) Devil, Ferocity, Oceans, Resolve
Favored Weapon Heavy flail
Symbol Serpent's head; severe, crimson snake head
Sacred Animal Snake
Sacred Colors Purple, red

Source: Scourge of the Godclaw, pg(s). 68ff
Type Outsider
(aquatic, devil, evil, extraplanar, lawful)
CR 29
Environment Any (Hell)

Source: Bestiary 6, pg(s). 24-25

The archdevil Geryon (pronounced JER-ee-ehn)[1] is the master of swampy Stygia, Hell's fifth layer.[2] Geryon is the source of all great heresies.[3] It[4] was formerly an asura rana before becoming an archdevil; it notably devoured 812 other tyrants of Hell before swearing itself to Asmodeus in the Only Vow.[5]


Geryon appears as a knot of three massive, scaled serpents. Humanoid torsos, including devilish arms and heads, sit at the end of each serpents' body.


When the empyreal lord Asmodeus found a simple, darkened shrine in Hell when wandering the Great Beyond, the serpent that would become Geryon appeared and asked him who he was. Asmodeus learnt of the serpent and its people, the asuras, as well as its neighbours in Hell, the velstracs. Asmodeus learned much of beings beyond Heaven, and he in turn shared many of Heaven's truths and innovations to the asuras and velstracs before returning to Heaven.[5]

The serpent recognised Asmodeus and remembered all they had learned from one another after he fell from Heaven and led his followers in an exodus to Hell. It petitioned to enter Dis, a bastion just hastily claimed by Asmodeus, and spoke in private to him. As they negotiated, a truce held between the invaders and defenders before the serpent exploded from Asmodeus' keep and nearly destroyed Dis.[5]

The serpent issued a call for Hell's tyrants to unite their armies against Heaven's rejects. 812 asura ranas, velstrac demagogues and gigas warlords answered the call, and the serpent consumed them all. With their armies shattered, the asura ranas cursed the serpent and fled to a corner of Hell called Atalu, while the velstracs departed Hell for the Shadow Plane, granting Asmodeus and his followers a foothold over Hell. Only Asmodeus knows what promises turned the serpent against its people.[5]

Asmodeus' forces proceeded to conquer the entirety of Hell except for the serpent's realm of Stygia, where the treasures, slaves, and cities of Hell's defiant inhabitants were transferred. After the end of the conquest, Asmodeus granted the serpent a legion of devils for it to consume and share their blood, along with all the spoils, wisdom, and secrets of the asura, and allowed it to continue ruling over Stygia. The serpent swore itself to Asmodeus in the Only Vow, a word that none remembers, and Asmodeus named it Geryon.[5]


Worshipers of Geryon crave forbidden knowledge above all things. Sacred places are hidden in old libraries and amid the ruins of fallen (or failing) kingdoms.[6]


Paizo published a major article about Geryon in Scourge of the Godclaw.

For additional resources, see the Meta page.

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