Artificial Soul

Compared to ordinary horse carriages, the phantom horse carriages clearly had many advantages as they only half-existed in the Mortal Plane. They didn't need to survive on food and water, nor were they picky with only travelling on straight roads. All they needed was enough magical power, and they could even levitate in the air for a short amount of time. They exceeded limits of space and the shape of the terrain. Especially enhanced phantom horse carriages even had the power to change their fixed trajectories.