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Sibyl was a half-fiend yuan-ti abomination who was an avatar of Sseth during the Time of Troubles and who wanted to become a god. Sibyl had four arms and a set of wings, which was unusual for common yuan-ti. She was ink black with clawed hands.
Sibyl was proficient—much more so than normal yuan-ti—in the fear spell.
- Lisa Smedman (March 2004). Venom's Taste. (Wizards of the Coast), p. 308. ISBN 0786931663.
- Lisa Smedman (March 2004). Viper's Kiss. (Wizards of the Coast), p. 306. ISBN 0786936169.
- Ed Greenwood, Eric L. Boyd, Darrin Drader (July 2004). Serpent Kingdoms. (Wizards of the Coast), p. 140. ISBN 0-7869-3277-5.