Weaken Magic

You cause the magical energy in one magical effect within range to weaken. You may lower the save DC of one ongoing magical effect you can see within range by 4 until the end of your next turn, cause a creature you can see within range to have a -2 penalty to hitting with spell attacks until the end of your next turn, cause a magical item you can see within range to lose its magical properties until the end of your next turn, or make a creature you can see within range make a saving throw for its spellcasting ability, on a failed save, it loses concentration on any spell it was concentrating on.