Other magical kind had to draw magic circles, or chanted spell or set up a ritual to draw the energy out from such stone.
But for the witches and warlocks of Earth prime, they could easily draw the energy of the world in the form of EXP like some kind of game.
But what these twenty-five people are doing is not absorbing the world energy into their body. And they are not taking the energy of the things around them to convert it into the energy of the restriction formation
Instead what they are doing is that they took the essence of this thing and channel it into the restriction dome
Essence, at this particular time, means simply the basic matter of the things, the core of what made something, something.
As such, the hardness of a stone is imbued into the restriction formation. The sharpness of a pebble is embedded into the formation. And so on and so forth