Pretty simple Malygos Quest Druid with the addition of Ferocious Howl for more card draw, and Splintergraft, which is sort of a poor replacement for Kun, but it’s the best we’ve got.
Possible additions could be Wrath and/or Malfurion the Pestilent. We could even go more Hand Druid-y with Witchwood Apples and Mountain Giants, though only the second one helps with the Quest.
Like other iterations of this, the basic idea is to complete the quest and then play a bunch of Malygos (Malygoses? Malygosi?) thanks to Faceless Manipulator, Twig of the World Tree, and Splintergraft.
UPDATE: -1 Muck Hunter -1 Ferocious Howl +2 Marsh Drake, since it can get pulled out by Branching Paths.