Meta: ISFDB. This shortstory appeared first in New Worlds, #158 January 1966, edited by Michael Moorcock. It was nominated for the Nebula in 1968. I’ve read it in The Doors of His Face, the Lamps of His Mouth and Other Stories, my review here.
The Amber series was not the first attempt of Zelazny to write a story about Demigods who can create universes or travel worlds or time. I’ve read the series a year ago and I find lots of ideas shining through in this story. Of course, the size of this proto-Amber story doesn’t give him enough room but thankfully he was able to fully developed them in his series.
Like Corwin, the protagonist is restless:
„The peace of the eunuch; the peace of lobotomy, lotus and Thorazine.“
Restless as Loki or Prometheus, I’d say, always rebelling.