Ball of Trapping

You can throw this ball at an object or creature (size large) to trap them in the ball. If the ball hits, an object fails the saving throw and a creature makes a DEX or STR saving throw (DC 16). If this saving throw succeeds, this creature cannot be trapped by a Ball of Trapping for 24 hours. If the saving throw fails, the creature is trapped in the ball for up to one week. If the creature is not released by the ball's user, the creature is expelled from the ball and cannot be trapped for another 24 hours. If the ball is thrown with something trapped inside of it, you can say the command word to release the object, throwing it at the same target as the ball's trajectory.