This long-forgotten magic mouth has been driven insane and twisted by its exposure to dark magic and the intense loneliness it has experienced.

Magic mouth spells are used to transmit welcomes, warnings, and messages to visitors. As these magical manifestations exist until they are dispelled, some are very ancient and forgotten. On rare occasions, long after the original spellcaster has died, the mouth gains sentience, becoming self-aware. Aware of its predicament and angry over being forgotten, it becomes vicious and utterly demented-a malignant mouth is born. Malignant mouths are usually found in ancient subterranean vaults, forgotten towers, and abandoned scriptoria (places of loneliness surrounded by ages of dark influences).

A malignant mouth remains partially bound by the spell which created it; thus, a malignant mouth will still be triggered to perform its intended duty. It will appear on a wall, object, or statue and delivers the message as intended, except the message is spoken in a twisted, tortured drawl or frenetic shriek. This disquieting noise will be punctuated by insane and painfully loud laughter.