Soulsight( Magic of Incarnum, p. 41)
You can attune your soul to sense living creatures near you. When you use this feat, your eyes glow with a blue luminescence.
Concentration 4 ranks, CON 13, WIS 13,
Once per day, you can invest essentia into this feat. While essentia is invested in this feat you can activate a limited form of blindsense, capable of pinpointing living creatures only, as a move action. This blindsense has a range equal to 5 feet per point of invested essentia. The blindsense lasts until the start of your next turn. Once the amount of essentia invested is chosen, it cannot be altered and remains invested for 24 hours. If you have the ability to bind a soulmeld to your brow chakra, the blindsense granted by this feat is capable of detecting both living and nonliving creatures. You gain 1 point of essentia.