The Mother Storm was the massive thunderstorm which first seeded the Edgeworld with life. Ever since the dawn of time, the Mother Storm returned to the Edge every few thousand years to release her energy at Riverrise and rejuvenate the Edgewater River. During the events of Midnight Over Sanctaphrax, the Mother Storm's path was blocked by Sanctaphrax, and the Anchor Chain had to be severed to allow her to proceed to her destination. The Mother Storm generated all other weather, including Great Storms. Whenever she prepared to return, the Mother Storm conjured up much more severe and unusual weather, such as Mind Storms, which played havoc with people's emotions.