MTL - Reborn In Tokyo After Picking Up Sayu Who Ran Away From Home - Chapter 7 teacher and student

Outer Sect Disciple Chen Yu, assimilates within his body a fiendgod heart.The heart, is the backbone of life, the human body’s fatal vital point. And it can be said that Chen Yu’s heart is actually his strongest defense point, and permits him to overtake demonic beasts, or divine beasts unlimited potential.Henceforth, he steps onto the stage and surges forth on a magnificent scale, in a heart-rending mysterious journey.Talented as a cloud, an unparalleled supreme talent.10,000 races glorious, cross boundary battles.Only my heart, eternal!

More than ten years later, this sentence gradually spread in Elbaf Continent:

Never use magic to deal with tyrants, because you will find that he will return your spells to you thousands of times after being strengthened by countless magic specialties.

This is the story of a dragon-shaped self-propelled fort that keeps doing things in another world.

There is nothing that one magic can’t fix. If there is, then there are more. ——Izawa

- Description from novelbuddy

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