Eye of the Rukh

Eye of the Rukh (ルクの眼, Ruku no Me), or Rukh's Eye, is a Magic Tool with Yamuraiha's long range Clairvoyance Magic embedded into it. If two people have one, they can communicate to each other even if they are in different places. Yamuraiha created this while she was still attending the Magnostadt Academy. Titus Alexius has some that he received from Scheherazade.