The 'Frightener is a boss-fight encountered in the video-game The Witcher and acts as a servant of the villainous sorcerer known as Savolla, who utilizes the beast to aid in breaking down the defence of the Witchers' castle and allowing a gang of bandits to raid the area.

The Frightener is a monster resembling a gigantic mantis and was described as being very powerful even to the Witchers - who were legendary monster-slayers, the creature was eventually slain in battle however due to exploiting the creature's weakness to loud noises.

Frightener is said to be exceptionally a rare monster and do not come into being naturally - it is the creation of powerful but often insane sorcerer. Once created, Frightener is considered by some to be near-invincible save to loud noises, silver and steel.