I heard the following in the 1983 fantasy movie Krull. The Cyclops did a deal with the Beast, the film’s monster. The deal was for the Cyclops to see into the future. For this, the Cyclops exchanged their two eyes for one. But the Beast tricked the Cyclops. Instead of receiving the ability to see many things about the future, they only saw the future of their death. Tricks on the mind can be subtle. They promise something that sounds good, but end up worse off.