Interplanar Telepathic Bond

(Spell Compendium, page 125, DnD 3.5)

Divination

Level: ; Sorcerer/Wizard 6
Components: V, S, M
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: You plus one willing creature/3 levels, no two of which are more than 30 ft. apart
Duration: 10 minutes/level (D)
Saving Throw: None
Spell Resistance: No

You crush the eggshells as you cast this spell, indicating your comrades in the party. Now, regardless of where they might end up, you will able to communicate with them.

This spell functions like Rary's telepathic bond (PH 268), except that the communication functions both on the same plane and across planes.

Material Component: Pieces of eggshell from two different kinds of creatures.