Pyremius
Pyremius is the Suel deity of assassins, fire, poison, and murder. Originally simply god of poison and murder, he poisoned Ranet, goddess of fire, stealing her portfolio and adding it to his own.
Pyremius is worshipped by pyromaniacs and assassins, and by jermlaines, firenewts, and grimlocks.
His symbol is the face of a yagnaloth. His closest allies are Syrul and Mydianchlarus. His realm in Niflheim is called the Black Volcano.
Sources:
- Complete Divine, page 123
- Dragon magazine #89 - "Gods of the Suel Pantheon"
- http://www.wizards.com/rpga/downloads/LG_Deities.zip
- Living Greyhawk Gazetteer
- Living Greyhawk Journal no. 3 - "Gods of Oerth"
- Player's Guide to Greyhawk
- The Scarlet Brotherhood
- The Temple of Elemental Evil