Koko wa Ore ni Makasete Saki ni Ike to Itte kara 10 Nen ga Tattara Densetsu ni Natteita - Chapter 210 - Introducing Mors

A skilled but unfortunate modern-day assassin was killed in a freak accident. However, he soon found himself summoned to another world by an evil wizard, who had him possess the body of a boy as an experiment. After successfully planning the evil wizard’s downfall, he used the wizard’s body as a springboard to gain influence and power in his new world.

- Description from Novelupdates

Xiao Chen was once a great soldier of Huaxia known for his strange, unique but effective tactics and plans during operations. He would always assume command and orchestrate highly-dangerous missions and would lead his unit to success.

He was known for being a great commander which made his military rank soar, from being a young lieutenant freshly graduate from the academy to becoming one of the youngest general that Huaxia had ever seen.

Sadly though his military career was cut short when he was deeply involved in the older generals politics. He died a tragic death when he was murdered by the men who he trusted so much and considered his brothers.

His soul wandered through the river of time and space still seeking vengeance and was soon swallowed up by a swirling light.

He soon found himself in the body of a monster or that’s what others consider him to be. He had a hulking figure pack with muscles,towering nearly 7ft tall, a pair thick tusks jutting out from his mouth and lupine ears along with the great desire for battle welling up inside him.

He begins his new journey as a green hulking monster or an orc as what his kind was called, a monster born for war and lived for war.

You shall become king—

Ruling over all “serpents” in the world…

Become the man who bears the brunt of dragonkind’s fear and hatred.

A modern era when humanity is threatened by attacks from giant dragons flying from beyond the sky.

Controlling “leviathans”—serpentine spiritual beings created through magic—humanity is locked in a protracted war of resistance against the dragons.

Fortunately, there exist witches known as “magi”—battle maidens of salvation who formed covenants with “serpents” in order to combat dragons.

Nicknamed Hal, the young man called Haruga Haruomi makes his living through facilitating the covenants of these girls.

At the (partially coercive) request of his childhood friend Asya, one of Europe’s top witches, Hal returns to Tokyo New Town after an absence of three years.

Accompanied by the beautiful Asya whose appearance rivaled a fairy’s, Hal is running all over the place to secure his base of operations and taking care of matters related to school transfer when the elite dragon Soth suddenly attacks—!?

Life has been breathed into a brand new myth between dragons and dragonslayers.

A grand opening to the “birth” of a top-class battle epic!