The Ark of The Covenant is mentioned by Sam, using it as a ruse to lure Castiel to Earth, under the previso that it's an Angelic item. Ironically, Castiel falls for it. It's unknown what powers the Ark of the Covenant actually possesses.
- In lore it was often a means used by people to communicate with God.
- The Ark was made most famous by the movie Raiders of the Lost Ark which Sam refers to when luring Castiel to him.