In the depths of the uncharted swamp, giant predators hunt and devour each other in a never-ending cycle of life and death. Those deadly giants stampede in terror, catching the scent of the Marro Hivelord, Tor-Kul-Na, silently searching the misty layers of undergrowth. The Hivelord leader rides on the back of a formidable-looking, giant Marro, a lesser Marro mentally controlled by Tor-Kul-Na.