The usage of copper (Mob Repeller)

Unlike other ideas, this will be a separate block that will be crafted with a copper base and will consume copper as consumable(fuel maybe). This will be a block where you can set the radius of mob repulsion, and the larger the radius, the more copper it will consume. More you play > more copper you can mine > bigger radius you can set. Also there no more need to use torches, carpets, or other things mobs cant spawn on. And that will aesthetic bonus to dark builds