An explosion rocked the ground, the shockwave sending dust to the sky. The world went silent for a few moments. When the dust cleared, it became apparent that nothing had been damaged. Not a tree moved, dust was the only thing, blackened into a starburst pattern on the ground. If one approached, they would see a black box in the centre. It was silent, simply sitting there, but if one could sense magic it would be seen that the box was heavily warded against magical attack or manipulation. If one could see through the layers of the world, into other dimensions, nothing would be obvious. If one was careful, however, a red trail could be seen, connecting the box to somewhere deeper. The trail was also warded, stopping it from being easily traced.
The box, although appearing to be corporeal, was actually an illusion formed of bent light rays. A bioelectrical pulse would grab at the mind of anyone within close proximity to it, causing any doubts of the box's validity to vanish from their minds. It was truly there for all that were present, seemingly as corporeal as the ground underfoot.