A sleepweaver is a ter'angreal that provides the user access to Tel'aran'rhiod. The most well known sleepweaver in the series was given to Egwene al'Vere by Verin Mathwin and was studied by Corianin Nedeal, the last Dreamer of the White Tower before Egwene. Other sleepweavers still in existence come in the shape of a striped stone ring, an iron disc, and an amber plaque of a sleeping woman.