Talk:Twilight's Kingdom - Part 1/@comment-5216016-20140505151727/@comment-10390252-20140505154716

The answer to this question might reveal something significant about the nature of Discord. Maybe Celestia didn't want him put in Tartarus. Or, maybe, his powers are so bizarre he'd be able to escape with a snap of a talon as soon as the chaos inherit in the place set him free from his prison.

Keeping Discord under control requires more than a prison, it evidently requires metaphysical order in his immediate vicinity.