Unbridled Itch (Ozzy HB)

As an action you point your finger at a creature you can see within range and cause an unbridled itch to spread across it's body. The target must make a wisdom saving throw. On a failed save the creature has disadvantage on dexterity saving throws and constitution saving throws made to maintain concentration on a spell which lasts until the spell ends.

At higher levels you can target more than one creature with this spell. You can target two different creatures at 5th level, three creatures at 11th level and four creatures at 17th level.