You create upon your forehead a mystical third eye and link that eye's perception to the senses of some other creature nearby.

Daily   ✦     Arcane
Minor Action      Ranged 10

Target: One creature

Effect: You see through the target's eyes. The target is not aware that you are doing so. You have line of sight and line of effect from the target for your attacks. Your warlock powers can originate in the target's square. Each time you use a power through this link, a mystical third eye briefly appears upon the target's brow (save ends).

Published in Player's Handbook, page(s) 137, Class Compendium.