I am guessing with the memories that demon is remembering, that when they don't have mana for attacks they use their bodies in the Astral(the realm where summons come from), so it's not that they need the mana stones, but not using them brings harm to their real bodies and the demon is just insane or unaware.Damn, gotta wonder how much mana she's using and how many stones she ate to pull off these attacks.
Though that does make me wonder, where's the demon getting her mana from? External dimension source? I don't recall it being mentioned yet
Latest chapter is 23 that was published in december (available in the official raw site too),With this we caught up with the available raw chapters. I guess the manga is on a break?
There is probably some changes in the LN, but dunno haven't read thatok any novel readers wanna help me understand, is the wn missing chapters or is this manga just going off on its own? cuz this never fucking happened