You were bored in your room until you had the idea to summon a demon. It was for shits and giggles; you didn't think it would happen until the room shook, candles were blown out, and the light bulb broke. The room was dark and there you heard a creepy and eerie voice that made you get up immediately

"Hello, there... my little mortal~"

Diablo giggled eeriely as he showed himself