Choose one humanoid that you can see within range to make a Constitution saving throw. On a failed save, you can choose to wither one of its legs or arms. If you wither a leg, the target falls prone and can't stand up for the duration. If you wither an arm, the target drops any item it is holding with that arm, and until the spell ends, it can't use that arm to use or hold items to hold items, make attacks, or perform somatic components for spells. 

At higher levels: When you cast this spell using a spell slot of 3rd level or higher, you can target one additional humanoid for each slot level above 2nd.