Mulligans
Combo:
Use Justicar to upgrade HeroPower
One Thaurissan tick (can be distributed if Thaurissan lives) on at least 3/4 of 2 Fallen Heros, Time Warp, or Coldarra Drake
Play Coldarra drake and as many Fallen Heros as you can before playing Time Warp. On your extra turn, play the remainder of the Fallen Heros for a minimum of 30 damage if you followed steps.
How quest works with Greymane:
so I assume Greymane works like Prince Malchezar, whose effect triggers after you draw your first cards, at which point quest will no longer be in your deck.
How to get quest:
Use elemental synergy to activate spell stone, Glyphs, Shimmering Tempests, and Toshley to complete the quest .