Breathless Melody

You choose one creature within sight and sing a melody so beautiful they become breathless. The targeted creature has to make a Wisdom saving through. On a failed save the creature is no longer able to breathe and takes 2d6 damage. On a successful save the creature takes half damage and suffers no other effects. (everyone can hear the song but only the targeted creature takes damage) The spell continues until the caster stops singing or until the caster takes damage (damage before the spell is cast does not count)