The First Heaven's Chosen-2

Robin narrowed his eyes when the story got to this point, that is exactly what he wanted to hear

Orzon then continued, "150,000 years after the beginning of the era of energy cultivation, a person appeared among the race of giants who was greatly respected by everyone. 

He was one of the strongest powerhouses in the giants' race, a true pillar that might hold the sky if it falls upon them, but he preferred seclusion and only appeared in the case of a war that threatens the survival of the kingdom of giants, he would participate and fend off the attackers then go back to his seclusion...

Near the end of his life, everyone understood why he liked to isolate himself so much... He went out to people and announced that he had invented a divine tattoo that could strengthen the bodies of all giants without the need to train in the "tiring and of limited benefit" human system.