Barrier Ward

A barrier ward is a set of inscribed orbs that are used by detective agencies to seal off a crime scenes. As an action while touching one of the orbs, you can speak the command word to activate or deactivate the ward. While active, the orbs hover 3 feet into the air and form a circle, with each orb connected via magical light, creating a 20-foot tall cyclinder of magical protection with a radius of your choice between 5 and 10 feet.
While the barrier ward is active, creatures can't enter the cyclinder by nonmagical means. If a creature speaks the command word as it enters the area, it can enter freely.