Mecha’thun Even Warlock Deck List Guide – Boomsday – August 2018

Our Mecha’thun Even Warlock deck guide takes you through the possibilities of this new potential archetype. We discuss card choices, mulligans, play strategy, and card substitutions.

Introduction to Mecha’thun Even Warlock

With the new expansion “The Boomsday Project” comes an exciting new win condition: Mecha'thun. Mecha’thun’s deathrattle destroys the enemy hero if you have no hand, no deck and nothing on the field when it triggers. While the effect is flashy, initial thought might have you believe that playing a 10-mana do-nothing card and expecting it to die with all these steep conditions met is at best a meme, but there are a couple possible applications that might just be viable.

Deck List

Deck Import

The most obvious way to play this card is in Druid, that class already has a “draw your deck to win” archetype. The issue is that deck so consistently draws itself and survives to do it is due in large part to Ultimate Infestation, which would work for Mecha’thun for the most part if you draw Ultimate Infestation early. Mecha’thun requires you to play out all the cards in your hand with an empty deck, and Ultimate Infestation can be hard to survive playing if it’s the last card you draw (or even just close to the last). Some lists are floating around that use Gadgetzan Auctioneer to draw your deck instead, but you also have to be concerned with Skulking Geist. Mecha’thun > Innervate > Naturalize is the most consistent way to trigger the deathrattle once the conditions are met, and Geist puts a significant wrench in that plan. There is however another class that can reliably meet Mecha’thun’s conditions without having to deal with Skulking Geist, Warlock, and it comes with a handy tool to skip the end-game struggle to empty your hand.

Warlock takes care of the empty deck requirement with its hero power, but how do you destroy Mecha’thun the turn you play it? Enter the underutilized Warlock spell Cataclysm. Not only will Cataclysm destroy Mecha’thun along with any other straggling friendly minions, but it simultaneously takes care of the empty hand requirement by discarding it all. Yes, that is fourteen mana, but there’s more. Also coming with “The Boomsday Project” is Galvanizer, a 2-mana minion that reduces the cost of Mech minions in your hand by one and Mecha’thun is, as the name implies, a Mech. If you play two Galvanizers with Mecha’thun in hand its cost is reduced to eight, leaving two mana left over if Mecha’thun is played at ten crystals. Still not enough to play Cataclysm, but it is enough to play another underutilized spell: Bloodbloom. Bloodbloom changes the mana cost of your next spell to cost health instead, so as long as you have at least five health left you can play all these together to destroy Mecha’thun and watch him take your opponent down with him.

What does the rest of the deck look like? The essential combo pieces are Mecha’thun, two Galvanizer, Bloodbloom and Cataclysm. These are all even-costing cards, which means it can be played with Genn Greymane. One-mana Life Tap is a lot easier to work into the curve than the normal two-mana version (considering how many times you need to press the button this is a deck where the odd hero power might actually be worthwhile, but alas it doesn’t fit), and those decks tend to have a lot of healing potential to counteract all the tapping the deck requires.

Mecha’thun Even Warlock Card Choices

  • Acidic Swamp Ooze – Malygos Druid is going to be big at the launch of The Boomsday Project, and while the deck will lean less heavily on Twig of the World Tree, you still can’t afford to let them have a 20-mana turn.
  • Spirit Bomb – This card is likely to be really helpful against decks like Odd Rogue. Even Warlock struggles to remove cards like Hench-Clan Thug when they’re played on curve, and this gives it a way to do it. The cost of four health might be too high for a deck that’s constantly sacrificing it’s life, but we’ll have to find out.
  • Skulking Geist – Naturalize gets played in many Druid decks anyway, but it’s an essential component of the Druid version of this deck as well. Geist gives this deck a significant edge in the race to Mecha’thun, and regardless of whether or not these decks are viable you’re bound to run into the Druid version a lot in the first few days of the expansion.
  • Genn Greymane – This deck needs to Life Tap a lot, and at one mana it’s much easier to fit into the curve.
  • Mountain Giant – Although this is a combo deck it’s hard to pass up a turn three 8/8, and the pressure this puts on control decks will have them worried about surviving more than racing to their game-ending combo.
  • Bloodreaver Gul'dan – The whole reason to play this combo in Evenlock is for the one mana Life Tap, but Gul’dan is still useful. You might not Life Tap at all in the latest stages of the game as your health is likely to be pretty low by that point. Gul’dan will help keep you in the game and buffer your health to allow the use of Bloodbloom for the combo. Also, playing this card often means a win right there against aggro decks.

Mecha’thun Even Warlock Mulligan Strategy & Guide

Against aggro you want to live and against control you want to race to your combo as fast as possible.

VS Fast Decks

Higher Priority (Keep every time)

  • Defile – Clears even the stickiest boards, slowing down aggressive strategies.
  • Doomsayer – Played on curve Doomsayer can often cause aggro decks to essentially skip a turn.
  • Vulgar Homunculus – Efficient Taunt minion for the cost, and helps activate your spellstone.
  • Hellfire – Played on curve Hellfire clears most boards and upgrades your spellstone.

Lower Priority (Keep only if certain conditions are met)

VS Slow Decks

Higher Priority (Keep every time)

  • Galvanizer and Mecha'thun – These are the worst cards to have as the last card in your deck because you need to play both Galvanizers with Mecha’thun in hand before your combo turn. Don’t bother keeping Bloodbloom and Cataclysm because you will draw them by the turn you need to use them 100% of the time (your deck will be empty the turn you use them).
  • Mountain Giant – Turn three Mountain Giant can cheese some wins against control and will at least slow them down to some degree.

Lower Priority (Keep only if certain conditions are met)

Mecha’thun Even Warlock Play Strategy

Your main strategy is to play both Galvanizers with Mecha'thun in hand, draw your deck, then play Mecha'thunBloodbloom and Cataclysm in the same turn to win the game.

VS Aggro Decks

You might not combo out against aggro very often. Your main win condition against these decks is likely to be Bloodreaver Gul'dan. Try to keep your health high and clear the board as much as possible. If you can safely play Gul’dan it will be hard for most aggro opponents to stick minions and pressure your life after.

Against most decks it is probably ok to waste Bloodbloom on something if need be, but Rogue decks take special consideration if Baku the Mooneater doesn’t show up at the beginning of the game. These decks might play Myra's Unstable Element and then Lab Recruiter a bunch of Fal'dorei Striders into their deck. The viability of this remains to be seen but endless 4-health minions means these Rogue decks won’t run out of threats as fast as other aggro decks would, and the Mecha’thun combo might be your only hope.

Apart from clunky Mech decks, you can expect not to run into as much aggro as usual for the first few days of the expansion as players will be eager to try out slower combo decks like this one. If the meta ends up being aggressive consider removing some of the anti-control cards like Mountain Giant in favor of more survival tools.

VS Control Decks

Plan A is to win with the Mecha’thun combo but depending on your opponents hand you might be able to pressure a win with Mountain Giants.

You can expect to see a lot of Druids running Naturalize so keep your hand size in mind when playing against them until you play Skulking Geist. You don’t want to have your combo pieces overdrawn.

Once you’ve drawn all your combo pieces don’t be afraid to Life Tap when it would cause you to overdraw. Most of those cards won’t end up mattering and it’s more important to empty your deck than make use of them. Keep track of your life total, especially against Malygos Druid. They can play Malygos and double moonfire for 12 at any point after they reach nine mana, so stay above that against them. Also, you can’t Mecha’thun combo if you are below five health. Bloodreaver Gul'dan can be helpful as you approach the last few turns of the game to buff up your life enough to play your combo.

Mecha’thun Even Warlock Card Substitutions

The Mecha’thun combo doesn’t require Genn Greymane, but given how much easier it is to Life Tap with one mana than it is with two I think it’s better that way. You could try a control Warlock shell with Voidlords and odd-cost removal, but that’s probably slower than opposing combo decks and you miss out on a lot of the early pressure that way. Also, if you have a Voidlord out on the Cataclysm turn it will leave Voidwalkers behind to disrupt the combo. This interaction is unlikely to be relevant very often but it’s something to consider.

Sticking with the even strategy, the list has some options. The list above is somewhat light on removal and doesn’t abandon the big minion pressure plan. The list could be adjusted to include Siphon Soul and Twisting Nether. Siphon Soul in particular might end up in the refined version of this deck just because all the Life Tapping demands just about as much healing as you could fit in. With that in mind Drain Soul could be a consideration, especially if you add Bloodmage Thalnos to the list. Thalnos has synergy with both Drain Soul and Defile, drawing a card on top of that which equates to healing for two in many cases as that’s one less time you have to Life Tap. Lifedrinker can also be considered if the deck just needs every healing card it can use.

A second copy of Cataclysm is unlikely to be worth it considering you have to discard your hand to use it, but a second copy of Bloodbloom could be useful in case you’re presented with the need to use one early on. I probably wouldn’t, there is already a back-up strategy with the normal Evenlock gameplan.

If you wanted to lean more heavily on the combo, Hemet, Jungle Hunter is something to consider. Hemet reduces your deck size without you having to damage yourself. For this you would remove most of the higher-cost minions and add in Bloodmage Thalnos and Loot Hoarders. You would also need the second Bloodbloom because you have to draw one of them before you play Hemet, along with both of your Galvanizers. You could add Witchwood Piper to help grab the Galvanizers (which may be worth it anyway, you don’t want Galvanizers to be the last card in your deck), but remember it won’t always hit them, especially with all the extra 2-drops. If this is the best way to play the deck, that means it might be better outside of the Evenlock shell, as you could destroy a lot more cards with Hemet if you include one and three mana cards.

With the new Magnetic mechanic, Mech decks will be popular for at least a little while after the expansion launches. Spellbreaker will be worth including to remove Magnetic buffs if you run into these decks a lot.


Martian's favorite hobby has always been card games. He's been playing Hearthstone regularly since early 2014, and is a consistent Legend player in both Wild and Standard.

Check out Martian on Twitter!

Leave a Reply


Discuss This Deck
  1. Alolki
    August 8, 2018 at 12:23 pm

    You need to stop making decks. You’re terrible at it.

  2. Spips
    August 8, 2018 at 9:52 am

    I’m having a hard time seeing why you’d gimp your Evenlock deck with 5 combo cards. The straight Mecha’Thun/Cycle list (no Genn) seems to perform its goal pretty well and it seems like it’d be pretty rare to combo someone using Evenlock. I guess I’ll have to try it for myself.

    • Martian - Author
      August 8, 2018 at 11:04 am

      Still too early to say whats optimal. The highest winrate Warlock deck with Mecha’thun on HSreplay right now is an Evenlock similar to this one, but it is not the highest winrate Evenlock.

  3. RunningRiot
    August 7, 2018 at 4:38 pm

    Is mage just a hard matchup? I lost to 5 in a row and they were either secret or otk

    • Martian - Author
      August 8, 2018 at 11:05 am

      Probably, they have so much burn and this deck is slow. In those matchups it might be best to try and just pressure them out of the game.

  4. Kaoz
    August 7, 2018 at 9:28 am

    But…..the card hint says….destroy all minions …discard your hand …..isn’t it the wrong order ?……if the deathrattle triggers BEFORE the discard, hand isn’t empty ….or has any pro played the combo successfully yet ?

    • Squineston
      August 8, 2018 at 12:11 am

      The combo has been played and works

    • Seinoud
      August 8, 2018 at 7:53 am

      The reason it works is due to the fact that Cataclysm is played first and that is something the game needs to register regarding the order of the cards. If Cataclysm is played the Mecha’thun deathrattle is the next thing after the cataclysm. So basically the deathrattle only triggers after the Cataclysm is done doing its job.

  5. Illneso2004
    August 6, 2018 at 11:39 pm

    Looks really good

  6. TheTurtleKing420
    August 6, 2018 at 10:19 pm

    would it be worth it to include Hemet, Jungle Hunter to thin the deck after drawing the combo pieces? Though I guess with this list you don’t really include a ton of low cost stuff.

    • Martian - Author
      August 6, 2018 at 10:34 pm

      Right, you would probably take out Geist, Mountain Giants and maybe Guldan to put in things like the second Bloodbloom, Loot Horders and Thalnos. That would make the combo more consistent but I felt like it was more viable with some of the regular Even package still in it.

  7. GlosuuLang
    August 6, 2018 at 3:35 pm

    To be honest, I think the deck would be more effective by removing combo pieces. Just include one Mecha’thun and one Cataclysm. There’s many matchups where the Even Warlock runs out of steam because the opponent removed all the big threats, and many times you die because of Fatigue. It’s in those matchups where Mecha’thun would shine. After you draw your whole deck, you play it naked for 10 mana. By that point in the game, it’s very probable that the opponent is out of removal and silence, so it’s not impossible for Mecha’thun to survive a turn. Then Cataclysm. By including 2x Galvanizer and 1x Bloodbloom you are adding three extra dead cards during the other stages of the game. Two dead cards is OK in Even Warlock, since you normally have a full hand anyway, but five…

    • Martian - Author
      August 6, 2018 at 3:38 pm

      At that point it sounds better to just play Evenlock as normal.

      • GlosuuLang
        August 6, 2018 at 3:43 pm

        I would see the 2-card combo as a tech vs super-greedy Control decks. Evenlock already has a few flexible spots with the likes of Black Knight, Stubborn Gastropod and Dread Infernal, which shine in certain matchups. I would definitely not cut Twilight Drakes in an Evenlock list, but hey, you’re a better player than I am, it’s more probable that you are right and I’m wrong.

        • Martian - Author
          August 6, 2018 at 3:55 pm

          Well I don’t know about that, and you might be right about the twilight drakes. Spirit bomb and Acidic Swamp Ooze might not perform depending on what everyone is excited to play tomorrow, those would be easy cuts to put twilights in. I’d be surprised if Mecha’thun survives to be Cataclysm’d the following turn against anything really. If you spend all your mana to put a 10/10 on the board you haven’t cleared anything. It could work though, try it out if you’re interested.

        • Gekix
          August 7, 2018 at 12:22 am

          I’d like to add here that in slow vs slow match-ups, both players tend to have a hand stuffed with removal during the fatigue stages of the game, so I think it’s very much impropable for your Mecha’thun to stay as is. I mean this deck threats are not recursive nor infinite (I count 6-7 if you include Genn, plus a Gul’Dan, who can’t really be expected to grind out even the non-greedy Control decks) so the opponent is bount to have at least a sufficient amount of removal lying in their hand to deal with a “measly 10/10” (as a side note I’d like to add that vs Control sometimes it doesn’t even matter if they can’t get rid of the body as long as they silence it, because a vanilla 10/10 can be more easily dealt with over the course of 2 turns, if their life total can afford it)