spellbinders communicate with each other with a handheld eyestone. the device has an outer lattice bearing the spellbinder insignia, and opens to reveal a small circuit board. an eyestone creates a weak radio signal, similar to a walkie-talkie. for communicating over great distances, an eyestone must be connected to a summoning tower. village summoners are the only people besides the spellbinders who are permitted to use eyestones.