A small stone cube given to Sevanna by Sammael (Sammael) so she can call him when she captures Rand. It is, in fact, a ter'angreal. It draws both saidin and saidar even when used by only one person.

References (Possible Spoilers)#

  1. In Lord of Chaos
    1. LoC,Prologue - Sammael finds Sevanna in Kinslayer's Dagger and gives her a call box.
    2. LoC,Ch53 - Sevanna still has the call box, but she decides not to use it after she sees Rand. She will keep him for herself.
  2. In A Crown of Swords
    1. ACoS,Prologue - Despite the chaos after the defeat at Dumai's Wells, Sevanna manages to hang on to the call box.
    2. ACoS,Ch20 - Sevanna has Someryn use the call box to summon Sammael (Sammael). When she channels Fire into it, it draws Earth, Air and Spirit, saidin and saidar.