Question: I don't understand why Leviathans feed on humans. They were created before humans existed and were locked away before humans existed. Why do they feed on humans?
Supernatural (2005)
1 question in season 7
Factual error: When Sam and Dean show up at the crime scene to investigate, they are stopped by a woman wearing digital Army ACU's. She introduces herself as Sergeant Miranda Bates, even though she has rank insignia on her cover and her chest that identifies her as a PFC (private first class). (00:14:05)
Dean Winchester: Driver picks the music. Shotgun shuts his cakehole.
Trivia: The inscription on John Winchester's gun is Latin, translating to "I will not fear evil."
Answer: God created the Leviathans. These beasts were among God's earliest creations, predating angels and humans. Whereas Death "personally found them entertaining", God worried the beasts would, as Death said, "Chomp the entire petri dish" as they proved to be too strong, too hungry, and too destructive. Sometime after he bound the Darkness, God locked away the Leviathans in Purgatory - which Death reveals as being specifically created to contain Leviathans. In addition, after locking the Leviathans up, God devised a means of killing the Leviathans should they ever escape Purgatory. When He had the Word of God tablets created, God made one for the Leviathans in case they ever escaped, putting instructions for the weapon on the tablet as well as a warning about them. In other words, they feed on humans to make them stronger.