i got an idea and i wanted to share It with you, when we get more ahead with the story, by that i mean many hundreds if the story Is short, or thousands if the story Is long, would you add the universe to the story? for example various races (ex. elfs, dragons,ecc.) or even unique races that don't exist already and each has their own Power system, talents, maybe higher and lower races that have vast difference in innate strenght, (like the difference between a dragon and a wyvern for example), maybe even galaxies, gods that reign those galaxies and dimensions ( for example First to 4th dimension), humans reside in the First, second dimension other races live, and the same with the 3rd and 4th, in each dimension time flows differently, and the Door trails are bringing people in those other dimensions, i know It sounds like a Grand but stupid idea, but i believe if you Plan everything carefully, the story would become many times Better than It already Is. Hope this idea of mine can help you.😉
ps. i Just realised i wrote 1k words, Sorry about that lol