Iris of the All-Seeing Oracle
This 8' diameter circular device, with what looks like a mirror in the middle, hangs in Doctor Strange's mansion. It is a secondary scrying device that Strange or his friends use when the Orb of Agamotto is inaccessible. The Iris allows 2-way audio-visual communications with another mage of the user's choosing anywhere on Earth. One must know the proper incantation to use it.