Decades before being summoned.

Arc was looking at his very first invader monster. The invader is very huge but with his stats the he can manage.

Arc: So you are the first invader I encounter huh? Then I will let you taste a bit of my power.

Arc condense huge amount of raw mana into his hands. The mana at first was like a rasengan but without rotation. it was raw mana that was being compressed to its limit. After a few minutes Arc stared at what you can call a red hakai or rather a red colored mana. Arc then looked at the invader and controlled the red colored energy to move to the invader. The red colored energy which he called red hakai was moving slowly to the invader, the invader only look at the calm looking red colored ball and touched it using his tentacles but it was one of his greatest regret because when it's tentacle touch the red colored ball, it expanded in a milli second and nothing can be seen of that monster.

Arc: HOLY MOTHER OF SHIT!!!! I thought it would only repel it because it was only pure mana but I think mana is destructive in nature or it was because I compressed it to its limit and when it expanded, it was so fast the invader got erased but who knows hahahahahaha

Arc laughed and was proud of his work but he did not think about it again he had another discovery that shook him. He found out that his status screen is incorrect. He was only strong because of the amount of mana he has. Mana can enhance the person's body and every time it consumes mana then it will be enhanced more. So the stats about intelligence is more like a sheet of paper that has no weight whatsoever.

Arc then did his punishment and tried to prepare for the fight with the Gods. he did not notice a small seed that is forming in his hurt. It is so small that dust is 10 times bigger than the seed. But he will soon found out about it's capabilities.