You are able to make binding Deals with other creatures.
Prerequisites
Fey Bloodline, bloodline level 5th.
Benefit
Once per day, you are able to make a Deal with another creature. The deal need not be fair or equitable, written out, or have any other special requirements beyond each party coming to terms for some sort of agreement. This can be as trivial as agreeing to say something nice about them in exchange for a smile to completing a quest in return for a great boon. It can be as fair as offering to pay full market price for a valuable treasure or as unfair as trading a head of lettuce for their firstborn. A Deal can be nearly anything, so long as it is agreed to and possible for each party to achieve.
The other party need not be made aware that they are agreeing to a Deal rather than a simple agreement, nor do they gain any special insight into the Deal even after agreeing to it.
Should either party break their side of the Deal, they suffer the effects of bestow curse. The caster level of this effect is equal to your fey bloodline level, and the DC to remove the curse is increased by the number of Fey Feats you possess.
If you break the Deal, the other party immediately feels a strong sense of suspicion that you have broken the Deal. While they gain no direct evidence through this effect, they are convinced you have broken the deal. The curse placed on you by this feat cannot be broken by any means short of a wish or miracle until at least two days have passed.
However, if the other party breaks the deal, you gain a +1 Arcane Bonus to an ability score of your choice for a number of days equal to your fey bloodline level or until they break the curse or perish. This bonus can stack with itself to a maximum bonus equal to half your fey bloodline level, rounded down.