BWbear

After crossing over into a world of magic, Dean Bruce was mistaken for a powerful sorcerer. Though he initially intended to sternly refuse the beautiful woman’s request to become her mentor, she offered him far too much to say no!
Completely clueless about magic, Dean Bruce had no choice but to make up spells on the spot. However, when he saw the astonishing power unleashed by the beautiful woman after chanting his random incantations, he was stunned.
The spells he had carelessly invented… could they really comprehend magic and even forbidden spells?
As Dean Bruce ascended to the pinnacle of magical prowess and became the Archmage, he candidly answered a reporter's question during an interview with the Alliance: "I never understood magic. I just made up a few incantations, that's all."
People were in awe of him—this, they believed, was the true humility of a Grand Archmage!

I Made Up Forbidden Spells, and They Actually Worked?

"System Alert: Congratulations, Host, for successfully guiding Lucy Michelle in mastering the high-level spell—Wind, Forest, Fire, and Mountain! The Host is rewarded with tenfold comprehension and power of Wind, Forest, Fire, and Mountain! The Host is also rewarded with 60 Supreme Mage points!"

"System Alert: Wind, Forest, Fire, and Mountain has been classified as a Sixth-Level spell with the potential to become a forbidden spell. The Host receives an additional reward of 300 Supreme Mage points and a ten-draw voucher!"

As these notifications flashed before him, Dean Bruce's tension eased immediately. According to his knowledge, Wind, Forest, Fire, and Mountain was a versatile and powerful spell capable of offense, defense, and escape. With the tenfold increase in its power and comprehension, he might not be able to kill the giant turtle before him, but he was confident that he could hold his ground.

Chapter 42: Counterattack