“ You type the command into the console. 'Insufficient Guineapigs' the computer responds. Baffled, you retype the command. 'Insufficient Guineapigs' the computer replies again. You decide you should start smaller, with a simpler command. 'Insufficient Guineapigs'
What does cycling the spaceship's airlock have to do with a now-extinct Peruvian rodent?”
“ If you want to add a 'supernatural' touch to your campaign, define the rules of magic and the universe. Make your players comfortable with those rules. Then your new supernatural creatures must then break those rules.”