A kind of villain (or evil artifact) able to attract people towards the Dark Side. Either by persuation, temptation or manipulation, by calling upon people's darkest desires and tempting them with the prospect of fullfilling their wishes or granting them power, or more simply because of the foul, evil energy that irradiates from it, so intense that it twists the mind of anyone who comes in contact with it and increases their inner darkness.

Those submitted to a Corrupting Influence grow increasingly evil, depending on how the influence works and the way they are exposed to it. This corruption may only occur when someone is exposed to a Corrupting Influence (though the victim soon develops an unhealthy addiction to it - or gets convinced by the villain's arguments) or increase gradually over the time, but if nothing is done to stop it the corruption will soon become permanent.