Don't you think if I had that much power, I would perform it for everyone? You offered to be my assistant, obviously protecting you is more important. I certainly can't go around having an assistant who is vulnerable to possession, can I?

Not to mention, whoever brought us here took away everything I use for spellbinding. Don't you see? Someone wants us to be possessed by these malicious spirits! That's why I can sense them, their power is stronger than anything I've ever come across before.