Comments of chapter undefined of just another harry potter fanfic

I'm curious, why no cultivation though? Also there is a lot of magic that acts similarly to cultivation if you want to keep it a purely magic and martial-arts based power system. If he can truly get any ability and use any type of magic system, then why not get Rimuru's crazy OP abilities for example? Or for example the 12 spells from Jackie Chan as a start. His ability gives him the possibility to do any type of magic or technique even those he technically shouldn't be able to do, so go wild!