Some believe the Shissar were the Builders, but this is not true. The Ulteran Spires already existed when the Shissar rose.
In EverQuest, one last outpost of the Shissar still exists on the moon of Luclin, in The Grey. Shissar are also found in the vicinity of the last refuge of the Combine Empire, in the areas surrounding Katta Castrum.
In EverQuest II, the Shissar were presumably destroyed when Luclin shattered. However, it has been revealed that "the Shissar knew their fate" and it is highly possible that they once again moved their temple. Some believe that the new location is The Void, and that the Shissar are the Shadowed Men.