The Styger is a creature native to the Imperial world of Fervious in the Calixis Sector of the Milky Way Galaxy.
The Styger is a beast that used by the feudal inhabitants as a domesticated draft animal. When a Styger gives birth to newborn young it produces a viscous fluid. Besides being healthy and nutritious, the substance is so thick that when a human consumes it, the milk coats the throat, windpipe and stomach for up to a day after being ingested. This coating is so effective that it can neutralize poisons and toxins. This substance allows the dairy farmers on Fervious to hold a monopoly and is one of their major exports.
- Dark Heresy: The Inquisitor's Handbook (RPG) (2008)