Rary's telepathic bond

Rary's telepathic bond was a divination spell that formed a telepathic link to let allied beings communicate.

Effect
When cast, the spell forged telepathic links between a number of intelligent, willing creatures, with each member linked to all others. Three other beings could be linked, or more fr more experienced casters. The caster could choose whether or not they were included in the bond at the time of casting. The members could were able to communicate telepathically via the link, whatever their respective languages. No other influence or power was possible through the links. It functioned over any distance, but not between planes.

It lasted 1.5 hours, or more with more experienced casters. A permanency spell could be used to make a Rary's telepathic bond permanent, but only two beings per use of permanency.

When cast on Avernus, the first layer of the Nine Hells, creatures linked by this spell heard an undercurrent of whispers, possibly in an infernal tongue, but they were unintelligible.

Components
The spell required verbal, somatic, and material components. The materials required were pieces of eggshell from two different species of creature.

History
The spell was attributed to the Oerthly archmage Rary the Traitor.