Hellmouth

A Hellmouth is a fictional concept often depicted as a gateway or portal to the Underworld or hell, commonly found in myths, legends, and popular culture. It is typically portrayed as a dark, powerful opening that allows evil forces, demons, or souls to enter or exit the realm of the dead. Often used in stories involving supernatural or horror themes, a Hellmouth symbolizes a point of intense dark energy or spiritual instability, representing danger, chaos, or evil breaking into the mortal world.