Kobold Bloodline

While many kobold sorcerers tout their purely draconic bloodline, over generations of eldritch training, some such spellcasters have created a bloodline that, while tinged with some draconic magic, is the embodiment of the race's virtue distilled into arcane form. Many practitioners of this bloodline go on to lead powerful kobold tribes.

Bloodline Arcana:

When you cast spells against opponents who are vulnerable to you (vulnerable to sneak attacks) you gain +2 to spell DC.

Nimble Walker (L31):

You are so in touch with the dextrous nature of your kobold ancestry that you gain a +3 to reflex saving throws.

Bonus Bloodline Skill: dungeoneering

Bonus Spells: reduce person, slow, polymorph, acid breath, tar pool, delayed fireball, protection from spells, greater polymorph