After casting an illusion spell of an object, the dau temporarily transforms that illusion into a physical, nonmagical object. The temporary object lasts 10 minutes, after which it reverts to being an illusion (or vanishes, if the duration of the original illusion expires). During that time, the illusion has all the physical properties of the object it represents, but not magical properties. The dau must touch the illusion to trigger this transformation, and the object can be no larger than 5 cubic feet.