Vortex Cannon

The Vortex Cannon was fabled and extremely dangerous weapon that it was capable of destroying the entire universe.

circle of huge stone heads buried in the ground. They soon find the Professor who explains that the rest of his team were killed trying to open a door to an ancient burial ground they discovered at the base of one of the heads.

It was hidden in a booby-trapped burial ground by an ancient and long-dead civilization. It was powered by the rare treed crystals. (DWBIT: Head Start, Jewel of the Vile, End Game)