Ears of the Bat

“Ears of the Bat” – This spell completely blinds you but increases your hearing ability to ultrasonic levels.

Liber Mysterium  
The Netbook of Witches and Warlocks  
By Timothy S. Brannan and The Netbook of Witches and Warlocks Team

Transmutation

Level: Witch 2, Druid 2, Ranger 2
Components: V S M
Casting Time: 1 action
Range: Touch
Target, Effect, Area: Self Creature touched
Duration: 1 Minute / Level [d]
Saving Throw: Yes

Spell Resistance: Yes

For the duration of the spell, gain a +10 bonus to your Listen checks, and a +4 bonus to Search checks for finding secret doors and compartments. The Ultrasonic location offsets most penalties of blindness (except you still suffer a 10% miss chance on attack rolls, and you move at 3/4’s your movement rate.) If you have the Blind Fighting feat, you suffer no penalties for blindness.

The material component for this spell is a bit of bat fur.