Vypper

Vypper is a creature of the swamps, haunting them, fighting for the territory with the kikimore.

In Wiedźmin: Gra Wyobraźni
Vyppers are large reptiles, like vipers the size of alligators. They can stretch their jaws wide, but the fangs aren't as much of a threat as they look. It's the poison one should beware of.

Trivia

 * Vyppers are mentioned in the passing in the short story A Grain of Truth.

Wipper