Magika no Kenshi to Shoukan Maou - Volume 7 Chapter 4 — The Only Darkness in the World (Part 5)

I was reincarnated into another world, and I’ve brought the Horadric Cube from Diablo II with me.
Being a knight is cool and all, but being a wizard is pretty neat as well.
So, which one will it be?

- Description from Novelupdates

The protagonist of a war fantasy novel, Theo, competes with his rival and antagonist, Luke, for the position of Supreme Commander. Having been reincarnated into Luke’s role, he struggles to fulfill his duties as the villain. “It seems like principles as a soldier, the duties I should uphold, don’t matter to you at all.” Even if misunderstood by Theo, Luke silently remained faithful to his role as the antagonist. After completing all his duties, Luke successfully gave Theo his happy ending, cast aside his military uniform, and retired from the army. Now, Luke planned to create his own future story without interference from anyone. That was the plan, at least… “Why go this far? I’m no longer a soldier, and if you really think about it, we were never on good terms anyway.” To make matters worse, not only had he unexpectedly reunited with Theo, but now, Theo was persistently and seriously pressing him in a way he hadn’t imagined. “I want to know you better.” It was a completely incomprehensible statement, and it wasn’t even an appropriate answer to the question. The protagonist came to the antagonist and suddenly asked for help, simply because they wanted to know him better?

The story starts on earth, after some unknown circumstances, the world was suddenly invaded by monsters from other worlds. Many died and even more turned into zombies, starting what many would call 'The apocalypse Era'.

Rin, a normal teenage boy who lost all of his family members was on the verge of falling into despair when a goddess appeared and sent him to another world that was very similar to a game Rin played before the apocalypse.

Her goal from this was simple, trample on all the protagonists and become the strongest creature in that world for a chance to get back what he thought he lost forever.

Accompanied by a cold beauty, both of them embark on a new journey to become stronger, get back to their world and fix everything.

After getting killed on the hands of the mighty nine-tailed fox monster, William found himself twenty years back in time.

At this time, he was a worthless kid, without spirit and weak spirit power. He worked as a porter in a famous academy, serving other disciples for living.

But the one who returned back in time knew this wasn't the end of the world. William had ways unknown to many. So he'll train and get stronger, turning himself into the strongest spirit master in the world.

Starting from such low point, he started his long journey towards being a real powerhouse. Despite using all his past life knowledge, he would be still faced with many challenges in the academy and in the world.

Yet William will conquer them all. His main goal will be to not just be something in this world, but to grow beyond the limits he reached before in his past life.

He wanted to get better prepared for the hideous and deadly enemy that killed him; the nine-tailed fox monster.

In such world and time, he got many years to train and scheme for his revenge. He would never allow the past failure to be repeated once again.

Join William's journey towards pinnacle and see how he crushes everyone else.