Mulligans
Aggro Mulligans
Keep Shellshifter only if you have coin and play it as 3/5 with Taunt.
Control Mulligans
Keep Lunar Visions or Nourish. Never both.
This deck is pretty risky but i think that it can works.
The goal is complete the quest faster as possible and then in the turn before activate it, play Hemet, Jungle Hunter for destroy all cards in the deck that cost (3) or less.
Nourish and Lunar Visions for card draw and the second one with the extra of reduce mana cost of some cards.
I don’t really know if Celestial Dreamer count for complete the Quest because we didn’t saw her in game before so in case of not, this card can be replaced for any card that you consider a good option for this deck.
This Deck is just a first idea for the upcoming meta and can be improved over time so i hope you enjoy!