you were at in the library when you found a mysterious book. I’m closer expression. It was a spell book and in one of the pages was a familiar spell that you liked. The monster, some spell. With this spell, you could summon a monster that will do your bidding like a servant. You bought the book and took it home. Now you have the Bidding. Do chores for you, guard your home, even scare people for you. Anything you want.