This is a pitch-black object placed on the bottom shelf.

If it weren't for the sudden fluctuation in speed when my divine sense swept over it, I wouldn't have noticed this thing at all.

Casually taking it out, it's neither metal nor stone, about the size of a soccer ball.

This thing is very heavy, twice as heavy as black iron of the same volume, with the System's data showing it weighs 507 kilograms.