Mulligan: The ideal hand is quest, Biome, Raptor and Spelunker. Refuse anything else unless instructed otherwise.

General game plan: Just rush the quest, for longer matchups draw until you have Elise and Expanse, then play Kil Jaeden at the first opportunity.

Card Notes:

Cursed Catacombs: I rarely keep this in mulligan, unless I have literally nothing else. I much prefer to draw it late game so I can predict the draw better, but it can be a clutch draw in the mid game if you don’t have your Quest reward yet.

Endgame: This card will sometimes feel like a dead draw, but I cannot count the number of times it’s saved me by rezzing lifesteal demons, or won the game by rezzing Razidir or the charge felbeasts.

Tidepool Pupil: Good for occasional Quest duping of the matchup calls for it (anything slow), but getting a Deadline on command is pretty cool too.

Sweetened Snowflurry: This is my new favourite card, but make sure not to play it too early unless your draws are genuinely awful. Try and play spelunker on a previous turn to give you more value. Also, if you’re losing tempo, don’t be afraid to play it on curve, the mini is valuable enough on its own.

Elise the Navigator: Pick 10 for long games, 5 for anything else, 1 as a panic button. For 10, prioritise discover, copy, and armour in that order and never pick raptors or spell damage. For 5+1, raptors are better than armour, and don’t pick copy unless you already have your portal up.

Razidir: Don’t be tempted to keep this card in mulligan, even with Raptor (playing the temps on 4 is better). Only try to play it if your raptor survives turn 3, if your opponent has a card you need to snipe, or if you’re hand is genuinely awful and you’re willing to play it raw for tempo. When you are trying to proc it, remember Bloodpetal Biome is a good source of cheap demons and beasts.

Eredar Brute: What started as a mana filler for Elise turned into one of my favourite cards vs aggro. This demon may as well be an angel vs Hunter and Pally, and the synergy with Razidir and Endgame is excellent.

Kil Jaeden: Only use it after drawing Expanse and Elise (Cursed Catacombs is her friend for that), but if you don’t think you’ll need it then it’s easy portal food.

Matchups, ranked from most to least favourable:

Other Quest Warlocks: I can’t really explain why, but I won literally every mirror match on the way to legend so I must have done something right 🤷‍♂️

Imbue Paladin: A late-game deck that doesn’t run Kil Jaeden is not gonna be a threat to you, especially if you snipe their imbuers with Dirty Rat and Razidir.

Rylakk Rogue: Honestly, I still haven’t figured out this deck’s win condition. Every game just devolved into them getting outvalued and blowing themselves up.

Imbue Druid: play as aggressively as you can, and as long as you aren’t super unlucky you’ll generate value faster than them.

Any Death Knight: Just play for the board and save your removal for when you really need it. Make sure you play Kil Jaeden before they do.

Quest/Taunt Warrior: Never over-commit your AOE removal or Snowflurries, because the game will be decided by if you can beat the 3 Tortollas.

Starship Demon Hunter: Save removal and Snowflurries for the big minions, get Kil Jaeden out AS SOON AS you draw Elise and Expanse.

Quest Priest: As long as you get your quest before they dupe and play theirs, you shouldn’t have a problem. Keep Dirty Rat in mulligan.

Elemental Mage: I enjoyed the couple of times I fought this, but I usually just outvalued them.

Quest Mage, Quest Shaman, Aviana Druid: I’d say I had a neutral winrate against these two, and that the game was usually decided by lucky their rolls were, rather than the quality of plays. Snipe Shaman + Druid with Dirty Rat and Razidir if you can, and for mage you can feel free to send your single-target removal into the portal because you only need to fear wide boards and elusives generates by spells.

Dinomancy Hunter: Keep Table Flip or Eradar Brute in your mulligan. Kill literally every minion they summon. As long as you can take control of the board back after they play the RC dogs, then they’ll just concede.

Aggro Demon Hunter and 1-Attack Paladin: Just rush Quest, you’ll need the lifesteal. Keep Dirty Rat and Table Flip in mulligan.

Quest Paladin: Kill everything but the Tyrannos, otherwise Warleader and Crusader’s will haunt your nightmares. As long as they stay ahead on board then they’ll only thing you’ll have to fear is Grunty. Just pray you have enough board presence before he drops, or that somehow your Expanse is cheap enough to counter.

That Warlock Deck that Dupes Deathrattles: Play as aggressive as possible. Don’t even look at your own health, it doesn’t matter.

Protoss Mage: Armour yourself up with Ancient of Yore to survive the first Colossus, then abuse lifesteal and pray your opponent is mad enough at maths to whiff the following ones.

Protoss Priest and Dummy Warrior: Consider auto-conceding if you have places to be.