Our Cube Warlock deck list guide for the Kobolds and Catacombs expansion will teach you how to play this popular archetype. This Cube Warlock guide includes Mulligans, Gameplay Strategy, Card Substitutions, and Combos/Synergies!
Introduction to Cube Warlock
Cube Warlock or Cubelock is a Combo deck from Kobolds and Catacombs based around interactions with Carnivorous Cube. This deck is new, fairly complicated, but also incredibly powerful in the right hands. It’s a mix between a classic Control and Combo decks – it takes both from the best worlds, with efficient AoE removals, high value cards, tons of healing, but also amazing cycling and a lot of burst damage potential.
Check out our Wild format Cube Warlock Deck Guide!
Cube Warlock Card Choices
This list features two cards that set it apart from earlier versions: Mountain Giant and Faceless Manipulator. While it’s not completely foreign to see either of these cards in a slow Warlock deck, they aren’t always played in this archetype.
Mountain Giant adds another threat to your deck, and one that can be played from your hand early without consequence. Doomguard discards two cards from your hand, which is often full of essential combo pieces, so if you don’t have Possessed Lackey in your hand or Skull of the Man'ari on the field you frequently find yourself without a proactive mid-game play. Due to the nature of the Combo archetype, and Warlocks in general, this deck is looking to draw a lot of cards. Mountain Giant rewards you further for consistently Life Tapping.
Prince Taldaram has proven very effective at enhancing your Cube combos, and including Faceless Manipulator is almost like adding more copies of him to your deck. While the mana cost of Faceless Manipulator is a bit more restrictive, it makes up for it by replicating the minions it targets at full stat value. A 5/7 Doomguard is a lot more threatening than a 3/3 Doomguard.
Update: Cubelock (March 2018 – Post Nerf)
Cube Warlock is one of the best meta decks, and while the lists still do change a bit, there’s no doubt that it is THE deck to beat right now. In our latest update, we’ve opted to go for the more anti-Aggro Doomsayer list.
Cube Warlock Mulligan Strategy & Guide
Against Aggro you want to have early board-clears and life-gain cards, and against Control you want essential combo pieces.
- Kobold Librarian – Cheap minions that draw cards have always been good, but this is one of the better ones. It activates Lesser Amethyst Spellstone, cycles through your deck, and provides you with a much needed 1-health minion for Defile that you don’t hate to put into your deck.
- Possessed Lackey – Possessed Lackey makes this deck happen. Accelerating out a Voidlord puts a serious wrench in aggressive game-plans, and hitting Doomguard allows you to escape the steep cost of discarding two cards.
- Skull of the Man'ari – Same as for the Possessed Lackey. The slight downside is that you might not draw any of your big Demons by Turn 5 (although it doesn’t happen often). The upside is that it doesn’t lose to Silence that hard, and that it can pull out multiple minions over a few turns.
VS Fast Decks
Higher Priority (Keep every time)
- Mistress of Mixtures – Warlock decks are always starved for healing cards, and Mistress of Mixtures is one of the better ones in Standard. Playing this when you go first almost ensures that your turn-2 Life Tap won’t cost you life, which makes cycling through your deck with your Hero Power less scary. Otherwise it trades decently with early minions and helps you set up your Defile numbers.
- Defile – One of the strongest board-clearing tools in all of Hearthstone, Defile is amazing at getting you through the early game. Defile handily clears small minions, and is one of the only ways to do so while also removing deathrattle-produced tokens.
- Doomsayer – The reason you play Doomsayer is that the card is amazing vs Aggro. When played on Turn 2, it usually pops and destroys the whole board. Not only you can clear some early game minions this way, but you also force your opponent to skip board development on his turn.
- Hellfire – While it might seem like a desperate keep, your ability to clear the board in the mid game is often what wins you the matches vs Aggro decks. It’s also a good set-up for the Lackey/Skull.
Lower Priority (Keep only if certain conditions are met)
- Lesser Amethyst Spellstone – This card is pretty bad at first, but even after just a single upgrade, it gets amazing. That’s why you keep it with Kobold Librarian, so you can guarantee a 5 damage + healing on the curve.
VS Slow Decks
Higher Priority (Keep every time)
- Mountain Giant – Against slow decks you can afford to spend your first few turns Life Tapping, which sets you up to play Mountain Giant on turn 4. Mountain Giants that early can often win you games, but it also soaks up opponents removal, making your later threats harder to respond to.
Lower Priority (Keep only if certain conditions are met)
- Doomsayer – Keep when going second and the rest of your hand is okay. Even though it’s more of an anti-Aggro card, sometimes you can keep it vs slower decks too, in order to answer their early game plays and stall their board development. DO NOT keep it if you’re going first, because you will need Taps on Turn 2 and 3 to play Giant. Going second, you can Tap on Turn 2 and drop Doomsayer on Turn 3, setting up a Turn 4 Giant really well.
- Carnivorous Cube – This deck is built to take full advantage of the Cube, and if you keep it in your opening hand you don’t have to find it. You probably want to have at least a Mountain Giant or Possessed Lackey / Skull of the Man'ari before you keep a Cube though.
Cube Warlock Win Rates
Cube Warlock Play Strategy
With this deck you’re trying to set up powerful plays with Carnivorous Cube, either to make an unbreachable wall or an OTK combo.
Games against Aggro aren’t different than usual. Most important thing is to constantly clear the board and survive. In case of Cube Warlock, the key moment is usually surviving until you clear the board and drop Voidlord your opponent can’t answer (e.g. Silence etc.). It can sometimes happen as soon as turn 6-7, although the biggest swing turns with Cube Warlock happen on Turn 10 – thanks to both Bloodreaver Gul'dan and N'Zoth, The Corruptor. But, how can you survive that long when your opponent is constantly trying to push damage?
Most important part is AoE damage. Your deck runs two AoE damage spells – Defile and Hellfire + a slightly different form of board clear, Doomsayer. All of those are really strong in different cases. Hellfire is just your generic 3 AoE damage – it’s enough to clear most of the early game minions your opponent will play. Defile is better when it comes to those tricky boards – if you can line up the health totals of minions, you can even clear 4-5 health minions, as well as everything up to that point. Doomsayer is easiest to counter, but also strongest in the early game, as your opponent will have to skip a turn if he can’t clear it. It’s also a good “proactive” stall tool – after you clear a board, you can drop Doomsayer to force your opponent to skip a turn. Very useful during later turns, when you have something you want to play next without being interrupted. Sometimes you can also drop two Doomsayers on a single turn – it increases the chance of them blowing up quite heavily. Yes, you use two cards instead of one, but it might be worth it if you need to stop your opponent from getting huge board.
One of the most important skill is picking the right AoE for the right situation. Generally, in the early game, try to rely mostly on the Doomsayer. Later in the game, it really depends on the deck you play against. If your opponent doesn’t really play 1 health minions, then you should take Defile value whenever you can. If he does – then you can be a little more greedy with it and wait for a good opportunity. Don’t use your AoE too lightly – Aggro decks usually have multiple ways to refill the board, so if you AoE down two small minions, you might not have a way to deal with e.g. Call to Arms or board flood from Zoo.
But, even with lots of AoE, your opponent will still deal damage – it’s just something you can’t help. For that reason, in order to keep yourself alive, you run quite a lot of healing. Between Dark Pact, Mistress of Mixtures and Lesser Amethyst Spellstone, you can heal for a lot, not to mention that Bloodreaver Gul'dan is usually a game over for your opponent, not only because you resummon Demons, but also because you heal for 3 more per turn.
Preserving your life total is important, but don’t mistake not taking damage at all with preserving health. Kobold Librarian is still one of the best cards vs Aggro, even if you take 2 damage. If it trades into your opponent’s 2/1 (for example), then you indeed took 2 damage, but you saved probably 4 or 6 in the long run. Life Taps are similar – even though taking damage and doing nothing is terrible against Aggro, but tapping brings you closer to your big Demons (and ways to summon them), as well as AoE and healing cards. You should still Hero Power in the early game, and in the mid/late game if you have free mana and still lots of health. Safe health really depends on the matchup and situation – e.g. Dude (Silver Hand) Paladins don’t have a lot of ways to deal damage without board, but Tempo Secret Mage can kill you from 20+ health over 2 turns, with no minions at all.
If you need more healing, you can combo Mistress of Mixtures with Carnivorous Cube. Two more copies of the 1-drop give you +8 healing, which can be crucial in matchups like Secret Mage. You can also copy Mistress with Prince Taldaram or Faceless Manipulator – although the last one is a really desperate play, sometimes that extra 4 healing is what saves your life and wins you the game.
Voidlord is a key card when it comes to surviving. But one is often not enough – not only it can get Silenced, but opponents sometimes have ways to get through it (e.g. Sunkeeper Tarim). That’s why cards like Faceless Manipulator and Carnivorous Cube + Dark Pact are so great – you can extra copies of it, so now even if your opponent Silences or deals with one, he still has another to go through. Prince Taldaram is also good – 3 mana 3/3 Taunt, which Deathrattles into 3 Voidwalkers is amazing, although you should probably Faceless/Cube first if you can (Taldaram has other good targets too).
If you get to Turn 10, a big Bloodreaver Gul'dan or N'Zoth, The Corruptor are usually GG, assuming that you can revive at least one Voidlord (+probably a bunch of other stuff, like Voidwalkers in case of Gul’dan and Mistress of Mixtures. Lackeys etc. in case of N’Zoth). If you have one in your hand already and you’re just a few turns off, try to not make any risky plays. Just clear the board constantly and heal up as much as you can. Turn 10 swing is going to win you the game almost every time, so there’s no reason to risk it.
When playing vs slower decks, just surviving is not enough. Not only some of the slower decks can outvalue you or kill you in another way (e.g. Control Warlock can win thanks to Rin, the First Disciple, while Control Priest can just outvalue you with all the Drakonid Operatives, Mind Controls etc.). Of course, it all depends on the game, but you usually have to just kill them before you run out of resources.
First and one of the most important cards in those matchpus is Mountain Giant. I’d say that around 1/4 of the games with Cube Warlock are finished around Turn 6-7 thanks to the Giants. Dropping a Giant on Turn 4 is really big when your opponent can’t answer it right away, mostly because you can do so many things later while still putting pressure. Your opponent has to play defensively, while you can push. Most of the time, unless there is some high priority target on the board, you just push face damage. 8 per turn is a lot and can’t be underestimated, especially against Warlocks (which should already be around 20-24 health from the taps and Librarians). After dropping the Giant, you have a few things to do. You can play another Giant, copy the one you have with Faceless Manipulator, play Skull of the Man'ari or Possessed Lackey (and no matter whether you get Doomguard or Voidlord, it’s still great), and on Turn 6 you can eat your Giant with Cube and Dark Pact it. The last play is especially powerful if you need to attack something and lose health in process. For example, if the opponent plays Priest and drops Drakonid Operative. Hitting it, then dropping Cube and killing it results not only in healing your Giant up, but also getting an extra one.
However, that aggressive push won’t always work. Your opponent might have an answer, or put a Taunt wall. If that’s the case, take the game a bit slower, especially with a very reactive hand. There is no harm in just clearing the board and waiting until Turn 10 swing or Cube combos to close out the game.
Talking about Cube combos – in slow matchups, it’s usually better to copy Doomguards than Voidlords. While Voidlords provide a huge wall, not only they aren’t aggressive enough, but Voidwalkers also dillute the Bloodreaver Gul'dan spawn pool. It’s a big issue a lot of players don’t think about – reviving 3-4 Doomguards is usually game-winning, while reviving 6 Voidwalkers and Voidlord is… not bad, but underwhelming. So it’s generally better to save the Cube combos for Doomguards. The best way to set those up is Skull of the Man'ari. Once it summons Doomguard, you go face (or bump it into something, you can even get the first one down to 1 health as long as it doesn’t die), then Cube + Dark Pact it, and then get another 10 damage. That’s already up to 15 damage, with two 5/7’s on the board your opponent has to clear. Then, if you go into your Gul’dan turn, you will most likely re-summon more Doomguards, often closing out the game as soon as Turn 10.
Since the deck runs no Siphon Soul or Twisting Nether, your reactive game vs slow decks is much weaker. It means that if you let your opponent drop a big minion or two, you might now have no way to deal with them. That’s the problem you solve by simply putting pressure all the time. If you have minions on the board and your opponent is pretty low, he has to remove them / Taunt up / heal up all the time, leaving no room to develop. However, this strategy takes a huge toll on your value. If you constantly push, your opponent usually gets the better trades, removes your minions efficiently etc. and you often end up getting outvalued. It doesn’t matter as long as you can kill your opponent first, though.
In the best case scenario, you should bait some AoE removals before your big Turn 10 plays. For example, N’Zoth is great, but if your opponent will just Twisting Nether, you don’t really gain that much (especially if all your Demons are already gone and Lackey won’t summon anything). If you have two of them in your hand, it can also be good to slam them turn by turn to put even more pressure. If you can choose between the two, generally it’s better to get out Bloodreaver Gul’dan first. Not only you have a higher chance to get Doomguards when not that many Voidwalkers have died yet, but you can get another Voidlord for N’Zoth + if you don’t end up playing them turn by turn, it’s better to have the 3 damage / healing Hero Power first.
Talking about the Hero Power, once you transform into DK, that Hero Power is often one of your main win conditions. Simply using it on your opponent every turn can put a lot of pressure on their health – like a better Hunter’s Hero Power. It’s best when you face a Warlock who hasn’t transformed yet. Generally, try to use it every single turn – in the best case scenario you “suck” their Hero, while deal with the board with removals like Hellfire, Spellstone etc. However, if you have a board yourself and clearing something will protect your board, it’s often worth to clear with the Hero Power too. It all depends on the context, how much burst you have, how much health your opponent’s at, board states etc.
- Faceless Manipulator and Prince Taldaram summon the targets of Carnivorous Cube when they die if they copied it. If they copy a Doomguard, Bloodreaver Gul'dan is that much more likely to summon additional Doomguards when played. Also keep in mind that while targeting Carnivorous Cube is their intended purpose, they can also target opposing minions such as The Lich King.
- If you think your opponent has Explosive Runes, you can use it against them by playing Possessed Lackey or Carnivorous Cube into it. You’ll still take four damage when you play Lackey, but the Cube absorbs all of it. Be careful with your Cube though, as time goes on Secret/Burn Mage is likely to start including Mirror Entity to punish these plays. Mistress of Mixtures and Plated Beetle (if you’re running a list that includes it) both negate the damage of Explosive Runes without being as harshly punished by Mirror Entity.
- Carnivorous Cube is a great way to punish your opponent for playing Doomsayer.
- Skull of the Man'ari and Doomsayer have an interesting interaction a lot of people don’t think about. Start of turn effects are resolved in the order they were played in. So if you play Doomsayer first and THEN Skull, even if you have a Demon in your hand, Doomsayer will proc first and only then your skull will summon a Demon. However, the other way around is more common. If you have Skull already equipped and a Demon in your hand, it would often be foolish to play Doomsayer, as that Demon will immediately die.
- Another interesting Skull of Man’ari interaction is that it pulls out a Demon BEFORE you draw a card. So, as long as you have a Demon in your hand and you don’t suspect that your opponent will destroy the weapon, it is possible to finish turn with 10 cards in your hand and not overdraw. Whether it’s worth it or not really depends on the situation, but sometimes you really don’t want to play any card and it’s better to take a slight risk of him destroying the weapon than to let’s say play Hellfire vs no minions.
Cube Warlock Card Substitutions
Although Despicable Dreadlord and Vulgar Homunculus are excellent cards that otherwise have good synergy with the deck, you can’t include them because they derail your consistency with Possessed Lackey, Skull of the Man'ari and most importantly Bloodreaver Gul'dan. You really want Gul’dan to summon as many Doomguards as possible to end the game.
Skull of the Man'ari, Carnivorous Cube, Voidlord and Bloodreaver Gul'dan are absolutely irreplaceable. N'Zoth, The Corruptor is also very important and replacing it will take a big toll on your deck. Other cards, however, including Doomsayer, Prince Taldaram, Faceless Manipulator or Mountain Giant can indeed be replaced. Here are some of the cards you can consider using instead:
- Siphon Soul and Twisting Nether – These cards are often run in Cube-based Warlock decks, and there’s nothing wrong with them. They are absent from this list to make room for Faceless Manipulator and Mountain Giant, so if you don’t have or don’t want to run that package these are good choices to replace them with.
- Bloodmage Thalnos or Tainted Zealot or Kobold Geomancer – Spell Damage combos well with Defile, so slower Warlock often include it. Defile is a strong enough card on its own, so it’s not necessary to run any Spell Damage, but if you’re looking for spots to fill this is a good place to look. Each of the cards above have their individual strengths. Thalnos draws a card when he dies, Zealot adds Spell Damage to an additional Defile tick, and Geomancer is guaranteed to be in your collection!
- Plated Beetle – Beetle is a good replacement for some of the cards IF you run a list with N’Zoth. If you don’t run N’Zoth, then Beetle loses a lot of its value.
- Spellbreaker – This list has cut Silence for the Doomsayers, but Spellbreaker is still a great tech in the meta. It’s amazing in the mirrors, especially if you play the aggressive game, and the ability to Silence off the buffs etc. also comes handy quite often.
- Spiritsinger Umbra – This card gets played a lot in Cube Warlock, and drastically increases your OTK potential. I talk more about it in the Card Omissions section.
- Acidic Swamp Ooze – Weapon destruction isn’t a bad tech in the current meta. It works best against Secret Mage (Aluneth) and in the mirror matchups (Skull of the Man'ari), but destroying a Vinecleaver or even Rallying Blade versus Dude Paladin will also hurt him a lot. And most importantly – it’s a cheap way to fill some of the gaps in the deck.
P.S. If you don’t have Skull or Cubes, but want to play a similar deck, you can always try out the Demon Control Warlock. However, keep in mind that it still requires a different set of Epics to run.
Cube Warlock is one of those decks in which you’d like to play more than 30 cards, but you have only 30 card slots. Some of the cards are missing simply because they HAD to be cut. It doesn’t mean that they are necessarily bad, and different lists might still run them, but you just had to remove something.
The most notable exclusions are probably Rin, the First Disciple and Spiritsinger Umbra. The Cube-less lists based around Voidlord are very passive, waiting for their opponents to run out of threats. For these decks, Rin is way more helpful than for this build. Rin dramatically accelerates the plan of running your opponent out of threats by removing their deck entirely. The strategy is effective in a lot of the Control matchups, but doesn’t go well in pair with the more aggressive strategy of this list. The turns Control Warlock decks would be spending to cast Rin seals are the turns this deck spends comboing Carnivorous Cube to end the game.
Spiritsinger Umbra makes the OTK potential of this deck a lot higher, but lowers the consistency of the deck somewhat. The general consensus is that Umbra is good in slow matchup, but it’s not great if you face a lot of aggressive decks which want to rush you down. While you can still combo her with Mistress of Mixtures in the mid game to get some immediate healing, it’s usually not enough to justify using it. When dropped on curve, it’s often just a 4 mana 3/4, and most of the combos are just too expensive. You can still tech it if you face a lot of slower decks, but with the recent wave of Paladins, it might not be the best choice.
You might be skeptical about playing the slow Warlock deck without any copies of Siphon Soul or Twisting Nether, but they don’t fit this deck perfectly. These cards are very defensive, and great for outlasting your opponents threats, but this is a deck that wants to be proactive during the turns those cards would be necessary. You can still add one copy of each if you want, and it will make your value game much better. However, if you want to slow down and drop some combo consistency, you might as well just play the Demon Control Warlock instead.
This specific build runs no Silence, but adding a single Spellbreaker is a solid choice, especially if you play a lot of mirror matchups.