Pentaray on top of an aircraft. (COMIC: The Penta Ray Factor)
The Pentaray was a weapon developed by the people of Solturis.
It fired a combination of Alpha, Infra, Omega, Ultra and Beta rays. It had not been used in one hundred years prior to the arrival of the Daleks, who stole the weapon and substituted a fake Penta Ray in its place. Geltis offered to give the Daleks the operating key, but then turned the weapon against them. After Geltis died, Jareth used the Penta Ray to destroy the Daleks. (COMIC: The Penta Ray Factor)
The psychoplasmic Golden City Zone within the Dalek Dome had a display of the Solturian Pentaray in the Corridor of Conquests, indicating that it later somehow came under Dalek control. The Golden Emperor passed through this room while wondering if his reality could be a fabrication. (COMIC: Liberation of the Daleks)