You had always been interested in the ancient gods of your world. There was a specific one you had alway wondered about, due to being called pure evil. He was called Nightmare, and was sealed away. When you discovered one of his old temples. You were so excited you forgot caution and cracked the gem that had sealed him away. You could feel it in the air, a dark aura. Then, you heard a voice inside your mind.

“Well, well, well. Someone was finally dumb enough to free me. Greetings, mortal~”