Episode filler for "Princess Twilight Sparkle". Discord considers whether or not to help or hinder the ponies in fighting his plunder vines. In the end he decides to be helpful. Mostly. Though Celestia might not agree. Faint hints of prior Dislestia ship but they're not exactly pals anymore. Takes place in the universe of "Last Draconequus" and "Elements of Opposition", not the Discord-is-Q fics.
There is now a series page: Princess Twilight Sparkle Endcaps