You decide to go back in time and research the information yourself. You set the dial on the time machine for several thousand years in the past and wait as it transports you to a long-forgotten era.

When the machine finally stops, you look around at your new surroundings. You’re in what appears to be a large cave, lit by torchlight. A man wearing a robe walks past you.

“Excuse me,” you say to him, “could you tell me where I am?”

He turns to face you and says, “You are in the Public Library for Demon Summoning Tomes.”

Well, how fortunate is that? It turns out that your home was built on the very same location where all the demon summoning knowledge of the past was stored. The phrase deus ex machina pops into your head, but you can’t seem to recall the meaning of it.

“Could you direct me to the tomes on summoning an undefeatable demon army?” you ask the robed librarian.

“Certainly,” he replies. “Follow me.”

A few minutes later, you have all the books that you require, and you walk back to your time machine. As you start the machine up for your return to the present, it makes a foreboding sound, like sparks and tearing metal. You can only hope that it doesn’t affect the trip home.

Return to the present.