I Began My Campaign Ten Years After Becoming the Overlord

He transmigrates to a world of swords and magic, and on the very day he arrives, he's identified as having the strongest life essence among humans.

He thought he would become a hero and save the people of another world from suffering.

But... am I actually the master of monsters? Was I rated at the advanced peak because that appraisal pillar can't measure anything higher?

Although I turned back into a child when I transmigrated, it doesn't matter. I can lie flat, or rather, lie low for ten years.

Ten years later, when my million-strong monster army is powerful enough to trample the world, I finally decide to stop hiding and march out to conquer it.

I've heard this world is dangerous. The strong raise the weak like livestock, and humans are just food for powerful foreign races.

"Just one Epic-grade monster is enough to make you a hegemonic nation."... I discover I have fifteen.

"Monsters above Legendary grade exist only in legends. They're nowhere to be seen."... I discover I have eight Legendary-grade monsters, plus Supreme-grade ones...

This novel and its characters are entirely fictional. Any similarities are purely coincidental. Do not imitate.