The cannon was first created by Seklos in order to kill Gaylen after his lust for power started to threaten the universe. Seklos then placed her own life core in it and destroyed Gaylen with it.
Many years later, after General Morando acquired Gaylen's Core and integrated it into himself. The royal heirs, Aja and Krel Tarron, created a replica of the cannon and intended to power it with their own life cores. However, the cores were supplied by a newly-regenerated King Fialkov and Queen Coranda, who gave their lives to power it.
It is a giant, modern gun with several barrels and a general colour scheme of grey interspersed with yellow. It has a small cavity used for containing cores.
3Below Part Two