Urzuul was one of many Dwarves of Nidavellir kidnapped by Nebula. She used Urzuul's fellow dwarves as leverage to force him to build her a teleporting axe and help her find the Naglfar Beacon. Before landing at the horn's location in the planet Draeketh, Nebula cast out the rest of the dwarves into orbit, sending them to their deaths. Nebula kept Urzuul imprisoned even after obtaining the Naglfar Beacon.
The Asgardians of the Galaxy tried to take the horn from Nebula. During their final battle, Nebula's axe was damaged, and she forced Urzuul to fix it on the spot. Nebula eventually lost the horn to the Asgardians, and fled using her axe. However, Urzuul had tampered with it to ensure she was sent somewhere unpleasant. Urzuul decided to stay with the Asgardians of the Galaxy as penance for helping Nebula find the horn.