In general terms, the combat effectiveness of ancient demons is approximately the same as that of legendary human knights and is much more powerful than that of any other human.
After learning of the Demon King's defeat, humans swept through the entire north, exterminating the young demons that still remained alive.
Damian was so strong that he didn't need to personally take on these tasks. Instead, he was now redesigning his naval fleet to keep his homeland protected from external enemies.
When he knew he no longer had to fight, the first thing he did was visit the special monument where each life and death of a soldier was represented.
"I have fulfilled what many of you expected of me. I suppose I now deserve a very long rest." Damian remembered those who died for him and couldn't help but feel sad.
They all hoped for a world like this; it was a pity that it took two hundred years to give perhaps the granddaughters of their daughters a world like this.
In this last war, around 48,782 soldiers died. The number may not compare to the enemy's extermination. However, when you think about all those lives instead of numbers, you will understand the world Damian sees.
"You have eliminated the Demon King. What will you do to keep the correct course for humans and not lead them to complete destruction?" Serie appeared behind Damian while eating a hamburger.
Damian didn't turn around to realize it was his teacher. "I will kill the useless and let the useful evolve human technology to a point of fortune."
"You believe too much in humans. I hope disappointment doesn't turn into regret."
"I'm going to seclude myself, maybe for a few hundred more years... Will you be the grandmother of my children?" Damian joked with his teacher.
Serie frowned and said, "Absolutely not. I will never take care of your descendants."
...
The Era of the Magical Emperor
Five Hundred Years Later
"Come on, grandma, you have to catch the ball." A boy with silver hair threw a ball at the face of a golden-haired elf.
Serie, the great mage of antiquity, looked at the new child of her most annoying disciple and murmured, "Until when will your father stop bringing me your siblings to be taken care of by me?"
The boy blinked a few times and murmured, "My father is worried that you, his great teacher, are depressed from being so lonely, so I come to play with you to have some fun."
"That brat..." Serie got up, walked towards the ball, and after hesitating for a few minutes, started playing with Damian's little son.
...
Magic Forest
In a wooden castle, Damian, who was now on a pile of modern inventions that wouldn't see the light of day for a few hundred more years, looked up and asked, "Is a brat trying to take my daughter on a magical adventure?"
Frieren didn't look up from her book and murmured, "She is three hundred years old. I think she is quite old enough to choose for herself."
"I won't allow that scoundrel to try to take my daughter if he is weaker than me."
"No one has been stronger than you in the last five hundred years." Frieren looked up, smiled charmingly, and approached Damian to convince him not to embarrass their daughter in front of the guests.
This time, Damian would not be influenced. The last time he was convinced by these ideas, he had to fight a war against the demons of the continent where he had once sent thousands of puppets and had to exterminate a guy named Sauron.
"The last time, I almost died at the hands of that enemy for bringing our son, who, by the way, is now constantly swimming with the whales."
Frieren recalled those scenes with the help of magic and said, "Thalía now only teaches magic, Lion swims with whales because he believes in the city beneath the sea, and your daughter Ari just wants to see the world."
Damian had six children, the youngest being five years old, and that would be the last he would have because he didn't want more worries. Now that Ari was three hundred years old, it was true that she needed to see the world, but he wouldn't make it easy for her.
"If you think it's a bad idea, you'll beat her to the exit."
Frieren nodded and said, "Of course."