 What is the meaning of the garments given to the narrator?
Words formed themselves on my thick tongue, words that must have been spoken by so many reviving unfortunates through the ages: "Where am I?" The voice was telling me that I had been snatched from worlds away, for a specified purpose here on whatever windswept planet Dondromogon might be. In a few moments two other men came—one a heavily armed officer of rank, the other an elderly, bearded fellow in a voluminous robe that enfolded him in most dignified manner. Your mind dwells so much on material strength that you lose touch with the spiritual—" He broke off, and wheeled on the attendant who had led him in. "Surely you are Yandro, the Conquering Stranger," he said, intoning as if in formal prayer.
 It shows the reader that the narrator is becoming Yandro.
 It shows the reader that Yandro is preparing to fight Barak.  It shows the reader that the narrator is going to play the part of Yandro, but not believe in it.  It shows the reader that the narrator is becoming Yandro.  It shows the reader that all Dondromogon prophecies are true.