From ROI Wiki

The Murg are a multi-dimensional race of super beings in the same strip as the Weavers, except that their purpose is to destroy and/or enslave the entire multiverse under their malevolent control. However, as they are few in number, they are unable to do this of their own power, and thus employ numerous races, and powerful entities within each dimension to push forward their dark agenda. They do this through use of either the Miraical (aka "Forges") or simple political and individual manipulation and control.