If could add anything with no restrictions to the game.

[Absimiliard]

Soulsborne-levels of difficulty in all content. By this I mean your classic curve where it begins down at Margit levels of difficulty and grows steadily throughout the game. By MSQ's end you would be dealing with difficulty at or near that of the Elden Beast. For endgame the scale would begin at around Nameless King levels of absurdity and scale right up until you're getting the full Orphan of Kos experience.