Red Dragon Roar

Novel Summary
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 readMTL