This archetype can be compared to the "Meklord Emperor" archetype. Both were specifically used to stop and restrain the key monsters of the protagonists of an anime series ("Number" monsters in Yu-Gi-Oh! ZEXAL and Synchro Monsters in Yu-Gi-Oh! 5D's respectively), with the former having a special effect (when Summoned via their signature card) to counter the unique anime effect of the "Numbers" that prevents them from being destroyed by battle by non "Number" monsters. In addition, both can absorb specific targets to leave their opponents defenseless, with "Meklord Emperors" being able to equip Synchro Monsters to themselves (removing them from the field while bypassing any destruction protection) and "CXyz" monsters being able to detach Xyz Materials from opposing "Numbers" and attach them to themselves, crippling their opponents' effects.
The scrapped "SXyz" monsters would have been the direct enemies of the "CXyz" archetype, as they would have used Shining Xyz Evolution as opposed to the Chaos Xyz Evolution, had they ever appeared.