Echolocate

Caster releases a soundwave similar to bats that allows them to "see" the surrounding area (gives 120 ft blind sight and advantage on all perception checks to do with sight, touch or sound). The caster can release a piercing wave of sound that deals 1d4 force damage (damage/level) and forces the target to make a constitution check. If they fail they fall prone for one turn and repeat the save to regain their ability to hear. Until they succeed they have disadvantages on attacks, concentration saving throws and perception checks to do with hearing. The spell and its effects are nullified completely by the spell "protection from energy".