Darkened Eyes

You infuse a creature's vision with darkness. After attempting its save, the target becomes temporarily immune for 24 hours.

Critical Success The target is unaffected.

Success The target's darkvision or low-light vision is suppressed for 1 round.

Failure As success, but the duration is 1 minute.

Critical Failure As success, but the duration is 1 minute, and the target is also for the duration. It can attempt a new save at the end of each of its turns. If it succeeds, it's no longer Blinded, but its darkvision or low-light vision remains suppressed.