Sareth's Summoning Formation

Sareth sat down cross-legged not far from the tree, looked up at the strange little fruit on the branch, and began calculating.

Foster Father said that the most important things to summon demons are the coordinates and then the offerings! Sareth recalled Roy's explanations. In high-magic worlds, the magic formations used to summon demons provide the coordinates, and the repulsive force of high-magic worlds is weaker, so even if the offerings aren't good enough, or even without offerings, you can attract demons and summon them. This is because demons don't need to pay too much when passing through to these worlds.