October 26 Update: Mulligan guide and tipps have been added.
This is my Malygos Quest Druid deck.
It performs really well.
Keep Worthy Expedition, Wrath, Doomsayer, Novice Engineer.
Against aggro or tempo decks you can keep Oasis Surger, Mind Control Tech, Starfall, Oasis Surger too.
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Win Condition A
Turn X: Elise the Enlightened to duplicate 2x Moonfire
Turn X+1: Malygos + 4x Moonfire = 24 DMG
Win Condition B
Turn X: Elise the Enlightened to duplicate 2x Moonfire + Flobbidinous Floop
Turn X+1: Malygos
Turx X+2: 2x Flobbidinous Floop + 4x Moonfire = 44 DMG
Win Condition C*
Turn X: Doomsayer
Turn X+1: Kun the Forgotten King + [1 or 2] xOasis Surger
Turn X+2: Zephrys the Great + Board buff = 15-30 DMG
*Although this scenario seems quite conditional, it happens often.
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* Use coin at turn 1 to complete the quest earlier.
* Use [card]Flobbidinous Floop[/card] for [card]Kun the Forgotten King[/card]+[card]Flobbidinous Floop[/card] combo, only if you think you will need 20 armor next turn survive.
* Use [card]Bloodmage Thalnos[/card] with damaging spells only.
* Optimal hand before using Elise the Enlightened is 2x Moonfire + [card]Flobbidinous Floop[/card] + Zephrys the Great + Malygos (optional) but duplicating Zephrys the Great would be enough against aggro decks running out of cards in late game.
I'll update the guide, if the deck can attract some attention with 5+ upvotes.