Devil's Sight( Fiendish Codex II: Tyrants of the Nine Hells, p. 83)
Your eyes glow red with infernal energy, allowing you to pierce magical darkness.
Devil's Favor (FCII) , WIS 15,
You gain darkvision out to 60 feet. If you already have darkvision, its range improves by 60 feet. In addition, as a swift action, you can gain blindsight out to 30 feet for 5 rounds. You can use your blindsight ability a number of times per day equal to the total number of devil-touched feats you have selected, including this one.