Cloud Mind

Choose a target that you can see within range. For the duration, whenever that creature tries to cast a spell, it must make a Wisdom saving throw. On a success, the creature casts the spell normally, and the spell ends on the target. On a failure, the creature's spell fails and has no effect, but the creature does not expend a spell slot. The creature can only make the saving throw if it attempts to cast a spell.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you can target one additional creature for each slot level above 2nd. The targets must be within 30 feet of each other when you target them.