Source: Dragon Magic
Your draconic blood grants you great sensory power.
Prerequisite: Cha 11, dragonblood subtype.
Benefit: You gain low-light vision and a bonus on Listen, Search, and Spot checks equal to the number of draconic feats you have.
Special: If you have three or more draconic feats, you also gain darkvision out to 60 feet.
Special: If you have four or more draconic feats, you also gain blindsense out to 20 feet.