I Returned to the Age of the Gods in Tokyo

[Mastermind behind the scenes, the only one with magic] After transmigrating to a parallel-world Tokyo, Togawa Saki acquired the Type: Earth System. His ultimate goal was to become the strongest life-form on the planet. But first, he had to raise the world's power level, or risk being exiled. After gradually discovering that this world had no Clock Tower, no Mage's Association, and no Holy Church, Togawa Saki began pulling strings from behind the scenes. As he did, Togawa Saki gradually became a magus, a Dead Apostle, a True Ancestor, and a Master, steadily advancing toward his ultimate goal: becoming the strongest life-form on the planet, Earth's Ultimate One. If it weren't for the Type: Earth System, I'd still be an ordinary Japanese high school student. Of course, there'd be nothing wrong with staying a high schooler, but becoming the strongest life-form on the planet opens up a whole lot more possibilities for me.