I saw this short and picked Alastor before I heard the catch..... oh dear...

For switch users: Think of any fictional character and (in this scenario of course) they will become real- catch is, they're whole goal is to kill you. But- you'll have all the powers of their nemesis to fight back. You win, they're your friend. They win, well say goodbye to your free will :D (I still can't believe I have to fight Alastor with electricity)