Below is the definitive list of appearances of Warlock of Ys in chronological order. Flashback sequences or story entries will be followed by a [Flashback] note. Stories that for some reason are no longer part of current continuity will have a comment saying this in a note following the entry.
Follow the links for a complete index of the issue, including story and creator info as well as full character chronology and in some cases story synopses.
Green Lantern Vol. 2 #42 (January 1966): "The Other Side of the World"
Justice League of America #161 (December 1978): "The Reverse Spells of Zatanna's Magic-cigaM"