Player's Handbook , pg. 270
Rary's Telepathic Bond
5-level
Divination
Casting Time 1 action
Range 30 ft
Duration 1 hour
Components V, S, M
Materials Pieces of eggshell from two different kinds of creatures.
Damage Type: Communication
Saving Throws: None
Description: You forge a telepathic link among up to eight willing creatures of your choice within range, psychically linking each creature to all the others for the duration. Creatures with Intelligence scores of 2 or less aren’t affected by this spell.
Until the spell ends, the targets can communicate telepathically through the bond whether or not they have a common language. The communication is possible over any distance, though it can’t extend to other planes of existence.
Class(es): Wizard, Sorcerer