Your idea of using interdimensional dragons is cool but it might mess up your story if not done well. Also I do not like nerfs but try to seal the dragons for some time, or balance it in a manner that wont ruin the story. The MC could easily be a godlike force with his advantages like the dragons and meta-knowledge.
Elizal_Bongaitan
Liked by 2 people
LIKEHi, Good day to you! Thank you so much for your kind suggestion. I like the idea of sealing the dragons for some time(I would use the idea), cause I want to slow down the progress of the story as much as I can to introduce the characters properly because I plan to introduce some side characters as the MC's comrades. Also, about the, nerfs I kind of want him to struggle as much as he can throughout the story.