Cyber Caliber
The Cyber Caliber is one of the relics of Thirteen. It is presumably cybernetic in some way, shape, or form, and it is powerful enough that Nexus Prime was willing to sacrifice himself as to ensure its safety.
Fiction
Exiles
The Infinite Combinatoric was created by Solus Prime. After the defeat of Liege Maximo, Nexus Prime took custody of the relic and decided it must be hidden away until it could not be done without. He fragmented himself into five forms, each carrying and guarding a fragment of the Cyber Caliber.