IT'S LIKE YOU WERE THERE FOR PLAYTESTING. (He was not, folks.)
To claim that this can be played with Magic cards, I needed to try it out. I reached out to my brother-in-law and was like, hey, do you have any Magic: the Gathering cards we can playtest this with? And he was like, sure friend.
I have never played Magic. When he came over with a "black mana deck," I didn't know what it meant until every card was named "flesh eater" or "rotting corpse".
Of course our magical girl ended up being at a school for young necromancers. It actually ruled. So go live out your gnarly necromantic magical girl dreams.