Tuathan Utility 6Bargain of Truth

Clasping hands, drawing blood, or placing marks on a scroll of magic parchment, you seal a mystical pact with another creature to speak no lies.

Daily        Arcane
Minor Action      Close burst 5

Target: One willing creature in the burst

Effect: Until the end of the encounter, you and the target must speak truthfully to each other. Whenever either target knowingly lies to the other, the listener knows it, and the liar is restrained and weakened (save ends both).

Published in Heroes of the Feywild, page(s) 112.