Bind Sage

This variant of planar binding is specifically used to call one of the most knowledgeable types of outsiders: the immortal and prophetic caulborn. This spell calls a single caulborn into a specially prepared trap. The caster of this spell can compel a bound caulborn only to provide information (using its Knowledge skills or detect thoughts); attempts to compel the caulborn to fight, guard a location, or perform some other task automatically fail. This spell otherwise functions as planar binding. The most effective gifts for a caulborn are unique books or intelligent creatures upon whose thoughts the caulborn can feed. The true names of caulborn are nearly impossible to discover, as they are not inherently individualistic.