His head raises, some, to look at Ardyn as the other man relishes in self-sabotage and spite. It's surprising-- for this seems like not the same Ardyn who had ceased his endeavors and merely waited upon the throne for the Chosen King-- but not for the grudge he holds.

Rebelling against the Draconian has always been met with power overwhelming, near the oppression of all of the memories of all of the history of the Star being flooded into the Chosen. Immortal or not, such power was never meant to impress upon human minds and bodies. Somnus won't even entertain the threat. Thus, he focuses on their present.

"We remain in this realm, apart from the Draconian's yoke. You are free, here."