I had an outsider/dead petitioner of pandemonium who grew all powerful and and mastered a wind and stone magic. He had a lot of cool things going for him, and his first fight went:

Kobolds riding on half dragon spiders ambush!

Rain of arrows on my character, two spiders jump up and bite me (both effected by my disease Warp Fever).

My turn. Unholy Vengeance: Control Wind to create Windstorm or something crazy, blows all the Kobolds off and back into a circle where they are trapped. Checks a few of the Spiders, allowing my party to finish them off.

Meanwhile, I teleport over to above the Kobolds (I'm immune to all wind effects as part of my wind magic awesome) resilient sphere over the leader kobold. Then Evard's Black Tentacles but doing sonic damage, and with a rider fear effect, I tear up all the other kobolds.

Dismiss the Control Wind, and then intimidate check on the lead kobold. Cha based caster and full ranks in intimidate, also, +infinity circumstantial for just tearing apart his entire squad in front of him.

He was our pet for the remainder of the campaign.