Deformity (Tongue)( Heroes of Horror, p. 121)
Through protracted self-mutilation that involves frequently piercing your tongue and dipping it in acid, your tongue becomes hideous to behold but oddly sensitive to the environment.
Willing Deformity (HH) , Evil alignment,
You gain the ability to sense your surroundings by taste, much as a serpent can. You gain the blindsense ability out to a range of 30 feet.