Ecolocation

When you cast this spell, you emit a loud high pitched noise that echos out for 100 feet in all directions, the spell then bounces back to the caster. You gain blindsight of 100 feet, however, you can only see with this blindsight as if you were at the casting location of this spell. The blindsight cannot go through solid barriers, For example, you cannot see through a house's walls even if the house is within range. The range of the blindsight increases by an extra 100 feet per extra level of spell slot used to cast the spell up to 500 feet. If you lose concentration, the spell ends.