Iron Bands of Bilarro
When initially discovered, this very potent item seems to be merely a rusty, iron sphere. Close examination reveals that there are bands on the 3- inch-diameter globe. Magical detection reveals strong magic of an indeterminate nature.
When the proper command word is spoken, and the spherical iron device is hurled at an opponent, the bands expand and tightly constrict the target creature if a successful, unadjusted attack roll is made. A single creature of up to frost giant or fire giant size can be captured thus and held immobile until the command word is spoken to bring the bands into globular form again. Any creature captured in the bands, however, gets the chance to break (and ruin) the bands with a successful bend bars roll. Only one attempt is possible before the bands are set to be inescapable.