mc has planet, and moon now he only lacks a sun. here we can see that... it's gonna be soon where he can form a whole solar system, then a galaxy, nebula, and whole star formation in his body.
I think MC's greatest treasure are these runes from Mysterious being & Yggdrasil. He should try to incorporate them into his Inheritance. Even any miniscule copy or understanding will be major boost to his strength.
