Band of unshifting

This simple band of iron, once placed over a creature in some way, will stop any shapeshifting abilities, such as locking a mimic in a form or stopping a troublesome changeling. The band cannot be removed by the person trapped by it, lest they succeed the DC20 strength check, but has no effect on a creature without any shapeshifting abilities, and will not secure around them. Can be removed by another creature by a DC12 strength check.