Twilight Sparkle is one of the most intelligent mortal ponies in all of Equestria. She's mastered more magic than any normal pony could imagine, and she's ever faithful to her teacher, the very goddess of the sun. One thing she lacks is common sense.

When a new test is presented under the guise of a proof of loyalty, she takes things a little too far, and may just ruin more than her relationship with Celestia.

Based on "The Binding of Isaac", both the game and the biblical story.