Zul-che-quon or Zushakon is a Great Old One featured in "The Bells of Horror" by Henry Kuttner. He is not described directly in the book, but is said to abide in a perpetual darkness, which he brings with him wherever he goes. Not only does an area where Zul-che-quon is soon to manifest grow unnaturally dark, but persons in the area develop a sense of intense itching and burning in their eyes, which grows so severe that they may claw their eyes out to put a stop to it. He is also said to be accompanied by a sound of rushing wings. A monastery in Mexico contains bells which are said to summon Zul-che-quon when it is rung.