I suspect he was more a one-trick pony.When the Metron appears at the end of the story, there's a “twinkling” effect around him (her)* that I thought had been added digitally in the remastered version. But it's lens flare that was present in the original film.
*Played onscreen by actress Carole Shelyne, voice dubbed by Vic Perrin. And, of course, the Talosians in “The Cage” were all played by women. Wonder if G.R. had a cross-dressing fetish?