5e SRD:Telepathic Bond
From D&D Wiki
|This material is published under the OGL|
|5th-level divination (ritual)|
|Casting time:||1 action|
|Components:||V, S, M (pieces of eggshell from two different kinds of creatures)|
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.