You assume a tough front when dealing with spirits and enjoy more powers when you do not incur their wrath.
Prerequisites: Ability to bind spirits.
Benefit: When making pacts with spirits, you can choose to increase a spirit’s binding DC by 2. If you successfully make a good pact with the spirit, increase your binder level with the spirit’s granted abilities by 1. When your binder level reaches 4 and every 4 binder levels thereafter, increase the spirit’s binding DC by an additional +2 and increase the bonus to your binder level by an additional +1, to a maximum of +12 to the spirit’s DC and +6 to your binder level at 20th level.