When the Holy Grail Comes

A certain lonely magician family sold all its assets, including the earth veins of the Magic City. Due to the increase in the quality of the earth veins, the Yusan Family created a new Holy Grail within two years. However, due to the excessive strength of the earth's veins, the servants that the new Holy Grail can summon within sixty years have already reached unimaginable power. Seven gods, seven classes, the battle is about to break out. The Demon City was like dust in front of them.