Glomulus was once a being used to clean a tavern on Okaara. He was only allowed out of his cage to eat the food that fell on the floor. One day, when he was released, he ran afoul of an Okaaran warrior who threatened to eat him. Glomulus in turn ate the warrior, then ate everyone in the tavern. Free, he made his way to the Forest of Weeds, where the orange light had been buried long ago. Smelling Larfleeze's meal, Glomulus entered Larfleeze's palace, where he was consumed by Blume. His identity was replicated and stolen, and Glomulus became the Orange Lantern of Sector 2826.
Years later, when Larfleeze voided the treaty between him and the Guardians of the Universe, Glomulus was among the Orange Lantern avatars who attacked the Green Lanterns who disturbed Larfleeze's palace. He killed Gretti, the Green Lantern of Sector 2828, and consumed his ring, thereby replicating his identity and bringing him into the Orange Lanterns.
When various Power Rings of all the different Emotional Corps sought out Kyle Rayner on Earth, an Orange Power Ring of Avarice was included in those rings. When surrounded by the Guardians of the Universe on Oa, the ring re-formed Glomulus. Glomulus accompanined Kyle Rayner, Saint Walker, Arkillo, Bleez, Fatality, and Munk back to Okaara as well as to The Orrey to find out who had actually stolen all the Power Rings from their wielders. Glomulus is later shown in the Battle of Odym being much more generous and helpful. After that the New Guardians went to confront Larfleeze thinking that he stole the rings and that he told The Reach to invade Odym. While fighting with Larfleeze, Glomulus tried to protect Kyle but Larfleeze killed Glomulus thinking of him as a traitor.