Comments of chapter undefined of Hero of Darkness

Honorable Author, why does Kahn spam Dimentional Cut and space force to fight legendary monsters instead of mastering his main skills and control over mana and world energy. Isn't it more crucial to aspect of fundament of his power insead of trump card such as Dimensional Law fueled by such as expendable and scarce source as Space force? imho, looks like he degradating after all that training in previous arcs, now using convenient ways. And we all know that there's no easy way for real Power.