Dolor

You draw upon the power of a planar binding to imbue your words with great arcane power, causing pain to creatures caught within that power.

This has no effect on creatures not caught in a planar binding spell cast by you.

Because your voice causes captured creatures strong discomfort, you gain a bonus on all opposed Charisma checks made to compel the target of your planar binding to perform some service. This bonus is equal to +1 per three caster levels. For example, a 9th-level caster would gain a +3 bonus on Charisma checks made to compel a bound creature to do your will, while a 15th-level caster would gain a +5 bonus.

Using Dolor more than once on the creature you compel may also make it more likely to try to undermine or distort the intent of your command and seek revenge (how this works is left to the DM’s discretion). If the result of your opposed Charisma check is a natural 1, the bound creature automatically sheds the planar binding spell, but you are automatically affected for a number of rounds equal to the creature’s Hit Dice as if it had successfully cast Charm Monster on you.