Soul Binding
Soul Binding:
To contact a vestige, you must draw its unique seal visibly on a surface (generally the ground), making the image at least 5 feet across. Drawing a seal requires the ability to mark a surface and 1 minute of concentration, and the act provokes attacks of opportunity. A vestige might also have other requirements for contact, as noted in its entry.
Once the seal is drawn, you must perform a ritual requiring a full-round action to summon the corresponding vestige. The ritual fails if you cannot be heard (for example, if you are within the area of a silence spell).
To make a pact with your summoned vestige, you must make a binding check (1d20 + your effective binder level + your Cha modifier). This process requires 1 minute, but you can choose to make a rushed binding check as a full-round action at a -10 penalty. The DC for this check is provided in the description of each vestige.
Whether the binding check succeeds or fails, you gain the powers granted by the vestige for 24 hours. During that time, you cannot rid yourself of the vestige unless you possess the Expel Vestige feat. Success or failure does, however, determine other aspects of the pact. If you fail the binding check, you have made a poor pact, and take a -1 penalty on attack rolls, saving throws, and checks until that vestige leaves you. If you fail multiple binding checks, the penalties stack.
The Difficulty Class for a saving throw against any power granted by a vestige is 10 + 1/2 your effective binder level + your Cha modifier.