Nico - Archdevil Arms

Archdevil Arms:
As of the Gala's aftermath, Nico starts gaining access to Archdevil Arms, which are essentially evolved versions of his weapons which, through the consumption of Souls, gain more and more power even surpassing their original states before becoming weapons. Esseem. ntially, they can be capable of destroying planets on their own and more should they grow enough. They even have, alongside their own sentience which surpasses their Devil Arm counterparts, their own realms in Nico's inner world for him to train in their powers, as they are the ONLY places in the Inner World where he can manifest them.

The List of Archdevil Arms Nico has is so far are as follows:

Ouranos

Erebus