Can we agree demons are useful?

Being a stupid college student you had decided to test the legitimacy of some online summonings for shits and giggles. As you whisper the incantations of a book you bought from a dusty old book store things go terrible right.

The lights within your dorm completely shut off, candles around you blowing out. As you see the soft glow of bright yellow eyes looking down at you.

“Why have you summoned me mortal?”

That fucking worked?!