Anti magic detection

You alter an item’s aura so that it registers to detect magicspells and items as though it were nonmagical, or a magic item of a kind you specify, or the subject of a spell you specify.

If the object bearing magic aura has identify cast on it or is similarly examined, the examiner recognizes that the aura is false and detects the object’s actual qualities if they succeed on a DC 17 Arcana Check, Otherwise, they believe the aura and no amount of testing reveals what the true magic is.