The Strongest Guild Master Founded a Nation in a Week - Chapter 223 - Sage Dragon King and Color Dragons

I am Master Siwei, and I speak for arcane arts.
This is an era of heroes and heroines.
This is an era of great changes.
In the end, it will be an arcane era opened by me.

- Description from Novelupdates

He—an enigmatic and cold-blooded soldier with a mysterious background.
She—a ruthless and bloodthirsty spy.

A world filled with heroes with superpowers. A world attacked by calamity fiends. A modern world filled with wonders and dangers.

Indra (5) grew up in her family while being shunned and ostracized. When she regained the memories of her previous life, she decided to run away from home and thus trained herself to absurdity.

During her training, she encountered the young adventurer Sword, who looked just like a middle-aged guy. Worrying about the impertinent, eccentric, pointlessly strong young girl, Sword invited her to go on a journey with him.