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.

Frighteners are said to be exceptionally rare monsters and do not come into being naturally - they are the creation of powerful but often insane sorcerers and once created are considered by some to be near-invincible save to loud noises, silver and steel.