The Indiscernible Dray

Two wheeled, single horse 5 sq ft cart with low sides (4 inch). Simple, but extraordinarily crafted. Hard, smooth dark wood made into simple curves. Medium harness with straps and bridle made of a stiff, strange, plant-like material. Two wheels have a swirl pattern for spokes and with a small cat symbol at the center. Elvish command phrase is carved into it, Elvish for "Time to stalk". When the command phrase is spoken, the creature strapped into the harness, driver's seat, and 5 cubic ft of the cart storage turns invisible for 1 minute. The illusion is for a certain amount of space, anything leaving the space is immediately visible. Once this ability is used, it can't be used until the next dawn.