Elemental God Training System

With the appearance of a mysterious man, the earth's magic circle that prevents species from advancing was destroyed, causing the earth's end of the law era to end prematurely, which meant the beginning of a new era. However, what was revived was not spiritual energy, but powerful elemental power. These elemental powers are the elemental energy for practicing magic in human bodies. However, not only humans, but also animals have also absorbed elemental energy, causing mutations and turning into terrifying monsters. But when the mysterious man left, he left behind a strange crystal, and that crystal came to the earth with this mysterious system...