I'm a legitimate adventurer, what's wrong with using potions to level up?

[Two Realms] × [Potion Sequence] × [Fantasy Adventurer] A Primordial Mirror granted Leo the ability to travel between two worlds. Initially cautious, he quickly discovered the strengths and weaknesses of each, his eyes gleaming with a strange light: "In the Sequence Path, I dominate with my profound cultivation level; in the Adventure Continent, I subdue others with my extraordinary mechanisms!" "Now, I lack nothing!" (A Western fantasy version of a two-world story!)