This story is a sequel to Vines
Zecora comes to Discord with an offer for peace, or at least detente, from the Tree of Harmony. She also has some advice. Too bad he's not going to take it. A post-"Princess Twilight Sparkle" fic that also serves as a prequel to "Elements of Opposition" and its related fics.
There is now a series page: Princess Twilight Sparkle Endcaps