From what I can see I don’t believe Chamber is a Radiant, it seems like his “tech” comes from Astra’s powers, he’s always interested in Astra, especially her arm. Maybe his tech/“powers” come from stealing Astra’s stuff.

Every game, someone instalocks Reyna. It doesn't matter if it's their first time, it doesn't matter if they don't know how to play duelist, they just instalock it. Instalock reyna's, why do you do that? What makes Reyna so special that yo...