Author's Note

Scyphi is the one that created the jar.

Reversed-Threading Universe Celestia couldn't open the pickle jar either, because it was never about the direction of the threading?

"Raven!" Reverse-Celestia called. "Raven, I require your assistance!"

Raven trudged into the room, ignoring everything else that Celestia had to say and making a beeline to the jar. She popped it open and walked away.

"Wh--"

"Chosen one," Raven muttered under her breath as she left the room. "The jars have chosen me."