Finally, at long last, he saw the pattern. The old warlock had been right. There were complex weaves of power. A mesh that fed upon itself and drew energy from the land and air around it. It held the portals open against the natural inclination of reality to force them shut… Given what he knew about the forces involved, he could work out their eventual termination points with complex astronomical calculations. He could finally create the divination spell that could search through those portals and find what he was looking for.
Magic, or the awesome shortcut to cool powers and success. Or that’s what it looked like to me when I was playing Warcraft III back in 2005.