Goblins vs Gnomes brought some interesting new cards into the fray for Warlocks. Handlocks and Zoolocks made it out the other side of GvG relatively intact, and both received fun new additions. Shortly after GvG’s release some pro-Hearthstone players started experimenting with demon-themed Warlock decks. Kolento, Darkwonyx, and most famously SilentStorm, have all had great results with DemonLock decks.

Deck Composition

2x Mortal Coil
2x Power Overwhelming
2x Darkbomb
2x Mistress of Pain
2x Imp-losion
1x Shadowflame
2x Voidcaller

Possible Inclusions
Voidwalker
Hellfire
Demonheart
Doomguard
Floating Watcher
Lord Jaraxxus
Mal'Ganis
Abusive Sergeant
Nerubian Egg
Big Game Hunter
Defender of Argus
Antique Healbot
Loatheb
Sylvanas Windrunner
Sneed's Old Shredder
Dr. Boom

Playstyle, Tips, and Notes

DemonLock decks are very control-oriented. Pro-player Darkwonyx even went as far as to take a page from Control Warriors and include Baron Geddon and Alexstrasza in his DemonLock deck in season 1 of the ESL Legendary series. Darkbomb brought a lot of power to Warlocks’ early-game control. 3 targeted-damage for 2 Mana is a good deal. Before the Undertaker nerf it was a dependable tool to stay ahead of Deathrattle decks. With Undertaker at a permanent 2 Health we can be a little greedier with Darkbomb and trade up for a 3-drop. SI:7 Agent, Aldor Peacekeeper, Mind Control Tech, and Earthen Ring Farseer are just some of the commonly-played 3-drops a Darkbomb can make short work of.

Mortal Coil is a card that has been in Warlock decks pretty much since day one. At a glance it seems low-impact, yet time and application have proven that 1 extra damage and card-draw is worth 1-Mana and a card. The king of all control-tools for Warlocks though is Shadowflame. It is a choose-your-damage board clear. Yes, destroying your own minion is a bit of a drawback but there are so many scenarios where either a minion was going to die the following turn anyway, or the upside of clearing your opponent’s board far outweighs the benefits of one minion. At 4-mana Shadowflame leaves plenty of room for combination with Power Overwhelming for big swings.

Imp-losion first became famous for it’s combination with Knife Juggler in ZooLock decks. In DemonLock it is just more removal with the upside of creating tokens on the board. The Imp tokens have the bonus of being demon leading to some potential silliness with Mal'Ganis.

The one minion that all popular DemonLock decks share is Voidcaller. The whole archetype owes it’s existence to this card. It is a 3/4 Demon for 4-Mana, that’s perfect fine. But it’s the Deathrattle that makes Voidcaller so good. There aren’t actually that many Demons in these decks and that is on purpose. The less demons in your hand, the more control you have over which Demons get played. It is much more impactful to have a Doomguard played via a Voidcaller than a Mistress of Pain. Lord Jaraxxus entering the board as a 3/15 minion will help keep control of the board for a long time. Getting Mal'Ganis out of a Voidcaller is the dream and will throw a massive wrench into your opponent’s plans. Expect opponents in the higher leagues to be keeping track of what demons you have already played and to play around a Voidcaller for fear of Mal’Ganis.

Mulligans

As always, early drops are paramount. Voidwalker and Mistress of Pain are good keeps since these are the demons you want to play out of your hand so that Voidcaller has a higher chance of playing a Doomguard, Lord Jaraxxus or Mal'Ganis later in the game. Darkbomb is a strong tool and should be kept in most cases. Priest and Warrior minions may take a little extra damage to remove, but Darkbomb plus a minion swing or Mortal Coil will still work in most cases. Consider throwing Abusive Sergeant back if there are no other low-drops in your starting hand. Sergeant is best used to buff a minion that is already in play to allow for a trade-up, to activate a Nerubian Egg, or used on an enemy minion to put it in range of Big Game Hunter.