Bit of a Work in Progress that I would like some feedback on, particularly in regards to pricing.
GEIS [-?]
You have a touch of the Faire in your blood, not enough to render you a full Changeling, but enough to give your words have a much more significant impact.
[...]
I was thinking about how to make this work. I think "Blessing of the Fey" is a bit much, because that would mean giving some of your power, which you don't actually have, to someone else. Just seems weird. It should remain between you and the one you give/take the oath from. That said:
Geis [-1]An Oath given is an Oath kept: Instead of taking a mild consequence in social combat, you may take an aspect, representing an oath sworn to that person instead. You may never have more than one of these aspects at any given time, so you would have to fulfil your oath before making a new one. The aspect is permanent, until you have fulfilled your oath or reconciled in another way.
I'll take your word for it: If an opponent is taken out in social conflict from your attack, you can place an aspect on him that represents an oath given to you. You may invoke it to enforce that oath or make the target reconcile in some other way. You may never have more than one person bound to you like that.
The new aspects would come with a free tag (since it is new), and you could use it whenever you are doing something concerning the oath. Likewise, it may be compelled whenever you are trying to act against it, so you have another source for a few fate points. I think an approach like that would be better suited than a flat out bonus to rolls. I'm not sure if my approach is the best, but Righteousness is probably not the power to copy for what you are trying to do.
For
I'll take your word for it, I thought about making it identical to
An Oath given is an Oath kept, so you could give an oath aspect instead of inflicting a consequence, but the way above should be better.