From Changeling Venue

Those who became lost on the moor were sometimes said to have been "pixie led", a term those who know of the fae know well. Lies and mischief are the very essence of the Fae, and many of the lost are unfortunate inheritors of that legacy. This oath, Also known as the Vow of Truth is used when such things can't be tolerated. This oath derives its well known moniker from the fables of pixies who deliberately led astray travelers.

Wording

"I swear to you only well spoken honesty and no lie, deception nor half-truth shall slip across my lips to waylay my brethren Lost and that I'll deal forthrightly in all my manners on this day."

or

"I promise to not try to trick you or any other changeling for the rest of the day."

Mechanics

Note: This custom pledge is low approval and is approved on a case by case with different low approval storytellers.

Type: Nemesis Pledge
Tasks: Forbidance (against knowingly attempting to deceive or mislead a changeling) -2
Boon: Adroitness (Expression) +1
Sanction: none
Duration: 1 Day +1

Total: +2 and -2 nets 0