When you cast a spell that affects an opponent's hearing, you're able to manipulate the sound waves to affect their sight as well.

Prerequisite(s): 9th-level bard

Benefit: Whenever you cast a spell that deafens an opponent for a certain amount of time, that spell blinds the opponent for the same amount of time also. If a spell that you cast causes an opponent to be deafened for a certain amount of time if that opponent fails a saving throw, then that opponent is deafened and blinded for a certain amount of time if that opponent fails the saving throw.