Iron Scarf

transmutation cantrip
Casting Time: 1 action
Range: 5 feet
Components: V, S
Duration: Instantaneous
As part of the action used to cast this spell, you must make a melee attack with a scarf, shawl, sash, or belt against one creature within the spell’s range (you may use your proficiency bonus when attacking otherwise, the spell fails. On a hit, the scarf magically expands and becomes as hard as iron. On a successful hit, you inflict 1d10 bludgeoning damage, and your scarf turns back to normal.
You inflict additional damage when you reach 5th level (2d10), 11th level (3d10) and 17th level (4d10)