Earlier today I posted my heroic Noth guide with pretty basic cards for Priest. The next guide will be for the second boss of Plague Quarter, Heigan the Unclean. This fight is pretty straightfoward and is MUCH easier than Noth, well at least for Priests that is.
However, there a couple of things to look out for so let me first start off with an introduction to Heigan on heroic difficuty. Heigan on normal mode has 30 health and his hero power is to deal 2 damage to the left most minion for 1 mana. On heroic mode, his health is increased to 45 and his hero power becomes deal 3 damage to the left most minion for 0 mana. So Heigan will use his hero power basically every single turn so you need to play around that. But with the deck I came up with it's incredibly easy.
Heigan starts off the fight with an empty board on normal difficulty. However, on Heroic mode he has a Voidcaller already on board. It is the most frequently used minion for this fight and you may want to keep your silences for this minion otherwise there is a good chance that you will have to face some pretty tough minions on turn 3-4 if your RNG is bad. Heigan's hand is full of demons like Doomguard and Dread Infernal so naturally you will want to avoid killing off early Voidcallers without Silencing them first or having good board presence to handle those tough threats. Of course if your RNG is good you might get him to summon a simple Voidwalker or a Flame Imp instead but you can never know :p Once Heigan's hand is empty or has 1-2 cards left (you just have to risk it), you shouldn't even hesitate to kill off these Voidcallers in order to avoid a topdeck Doomguard.
Here is the Priest deck I used to defeat Heigan the Unclean on Heroic mode. It's a pretty cheap deck mainly consisting of basic cards with some uncommons and four rares. You can replace Mind Control Tech with a second Lightwell if you have it. I only used MCT in case I didn't get anything for earlier turns to maintain board control so I might have to take control of one of his minions. However, I neither drafted MCT nor I needed to use him ever. So you might want to replace him with whatever you might think is better.
Mulligan: You might want to keep Silence if you have one on your starting hand. Nerubian Egg, Shadow Word Pain and Lightwell are the cards you are mainly looking for early game. Holy Smite is also a valuable card to have early on to deal with Flame Imps if Heigan decides to play them.
Strategy: The most important thing for you to do is to not panic. When you start taking back board control you might be pretty low on health but just take it easy. In my case I had about 5-6 health left when I took full control. Try to keep your health above 5 though to avoid Doomguard and Soulfire or definitely have a Taunt up if you have only 5 health left. Heigan is a warlock so he uses a lot of demons and Warlock class cards like Soulfire, Mortal Coil, Bane of Doom and Demonfire. There is no real reason to rush Heigan here, it's a pretty simple encounter and it's like a guaranteed win if you play control. However stabilizing will take time so just be patient and do not concede early on. It is possible to make epic comebacks against him when you have like 4-5 health left.
On mulligan, I told you to keep Silence. But don't use it immediately on turn 1 if you get it. In my case Heigan used Demonfire on turn 2 to buff his Voidcaller so waiting for the second turn might give you more value but he might also play a Deathcharger instead so you can never know. But definitely keep Silence for 1-2 turn later, he will use that Demonfire on something eventually or it's always good to use it on a Voidcaller before you kill it off.
Another thing to look out for is his spells of course. If you have a minion with 4 health left, Heigan will use Soulfire or if you have a minion with 1 health left he will use Mortal Coil. Of course you will want to avoid that so during certain turns you might be tempted to heal yourself to be on the safe side but heal your minion instead, the pay off is greater as board control is much more important here.
Here comes to tricky but fairly easy part to deal with Eruption. Of course it is the best way to activate those Nerubian Eggs we have in our deck. For late game you will need certain spells and minions to solely deal with Eruption, but for early game Nerubian Egg is the best way to get value from Heigan's hero power as the Nerubian can be used to trade off with that early Voidcaller. You might want to play Haunted Creeper to summon tokens as well but I didn't run them for my deck, I mainly focused on late game. For early game I also played Lightwell for extra healing. I only have 1 Lightwell so if you have 2, running 2 Lightwell is not a bad idea at all!
But this tactic is for early game only because what we really want to do eventually is to use our usual gimmicky Priest spells to buff up a Stoneskin Gargoyle to soak up Eruption. When you have enough mana play your Gargoyle and buff it with whatever you can think of, there are no secrets to worry about on this encounter so don't hold back. Divine Spirit, Power World Shield and Inner Fire, just go full out. Stoneskin Gargoyle will withstand Heigan's hero power easily and still can be used to trade off minions and survive easily in the end. You won't even need to heal it as it will heal itself back up to full on your next turn.
This is how my board looked like when I had lethal. These two minions were pretty much all I had for at least 5-6 turns until I killed him. Once Heigan runs out of cards, don't hesitate to take down those Voidcallers whenever he plays them because he will get 0 value from it. So you won't be facing sour surprises like Doomguard and Dread Infernal out of nowhere. But even if you do, that's what Shadow Word Death is there for ;) But again, do not panic on earlier turns. You might not get those eggs soon enough or have any means to handle the board. Just keep healing yourself, this deck has all the means to make a legendary come back. Good luck and have fun!
Ps: Loatheb heroic guide will be posted tomorrow. I tried him only 3 times with different classes (Mage, Rogue and Priest) and got him on first try with a Priest. Priests are really overpowered in Naxxramas it seems :/