Etch Metal

cantrip, concentration, 1A, lasts 1 hour or until concentration drops. the caster places their hand on a metal surface, and may inscribe a simple carving, no larger than 1 square foot, which lasts 1 hour without consent from the wearer, object, or being, and permanently with consent. This does not reduce AC. The font is decided by the wearer/object/being. At 5th level, this spell may (user discretion) cause a -1 to AC, 11th level -2 to ac, and 17th -3 to ac.