"In his house at R'lyeh, dead Cthulhu waits dreaming..." - English translation of Aklo verse
This article is written on a topic within the Greater Cthulhu Mythos based on information from works in the Mythos. By default, all information is to be assumed to derive from the Lovecraft Myth Cycle unless otherwise marked.
B'gnu-Thun (The Soul-Chilling Ice-God) is the twin brother of Ruhtra Dyoll. He appears as humanoid figure made of ice followed by a eerie blizzard.