Blast Furnace (Blackrock Foundry) Strategy Guide

By perculia Updated: 2018/05/12

Foreman FeldsparHeart of the MountainBlackrock FoundryGruulOregorgerBlackrock FoundryWarcraft LogsLoot and RewardsSeal of Tempered Fate Bonus RollsBlast Furnace

LFR (655)

Cloth: Bracers of Searing Heat, Pyroclastic Hood
Leather: Raging Pyroclasm Leggings, Spaulders of Tempered Fury
Mail: Chest of Heaving Bellows, Grips of the Ruptured Furnace
Plate: Gauntlets of Electrocution
Neck: none
Cape: none
Ring: Firecaller's Scorched Seal
Trinket: Furyheart Talisman
Weapons: Flickering Lantern Wisp, Spire of Pyroclastic Flame
Armor Token: Tier Legs

Normal, Heroic, Mythic (670, 685, 700)

Cloth: Bracers of Spattered Steel
Leather: Furnace Tender's Treads
Mail: Blast-Proof Cowl, Slagstomper Treads
Plate: Fleshmelter Bracers, Lava-Dipped Greathelm
Neck: Engineer's Grounded Gorget, Feldspar's Control Choker
Cape: none
Ring: none
Trinket: Blast Furnace Door, Elementalist's Shielding Talisman
Weapons: Crescent of Living Magma, Mouth of The Fury
Armor Token: Tier Legs

Sigil of the Black HandSigil of the Black HandElemental Runelegendary questlineMight of the Elemental LordsBlackrock FoundryHighmaulGlory of the Draenor RaiderGorestrider GronnlingBlast FurnaceYa, We've Got Time...Blackrock FoundryHighmaulMythic Draenor RaiderReturn to Table of ContentsNotable Trash MobsSlag Behemoth

Ignite will target a random player; after several seconds, that player will detonate, dealing moderate damage to players within 5 yards.

The Slag Behemoth throws a Volcanic Bomb at a random player, which knocks back and damages all players near the point of impact.

The Volcanic Bomb also creates a spike at the impact location, which blocks line of sight.

The Slag Behemoth will emit a Blast Wave, dealing heavy raid-wide damage. Players can avoid this damage by line-of-sighting the boss behind a spike created by the Volcanic Bomb.

IgniteVolcanic BombBlast WaveBlast WaveBlast WaveReturn to Table of ContentsBlast Furnace Tips & Strategy

Phase 1: Destroy the Heat Regulators on either side of the Blast Furnace

Phase 2: Defeat the four Primal Elementalists who have captured the Heart of the Mountain

Phase 3: Defeat the Heart of the Mountain

Security GuardFurnace Engineerbefore initiating the fight, players should assign 1 tank, half the DPS, and half the healers to each side of the room

Each tank will take one Security Guard and one Furnace Engineer with them to their half of the room, and one of the tanks will need to pick up Foreman Feldspar.

If there are an uneven number of healers, have the extra healer follow Foreman Feldspar and heal the tank who is tanking him. While the raid is getting into position, and before any higher-priority targets spawn, players can spend some time damaging Foreman Feldspar.

Blast

This deals unavoidable raid-wide damage and healers must be prepared to heal through it while still managing the healing tasks created by the other mechanics of each phase.

The rate at which the Heart of the Mountain gains Energy is influenced by his Heat level, which appears as an Alternate Power bar on the Heart of the Mountain's unit frame; the amount of Heat the Heart of the Mountain gains is determined by how well the players handle the mechanics of the first phase.

0-24 Heat: Blast occurs every 30 seconds

25-49 Heat: Blast occurs every 20 seconds

50-74 Heat: Blast occurs every 15 seconds

75-99 Heat: Blast occurs every 12 seconds

100 Heat: Blast occurs every 10 seconds

Return to Table of ContentsPhase 1: SabotageBombBomb

Furnace Engineers will target random non-tank players and cast Bomb on them.

Upon dying, Furnace Engineers Drop Lit Bombs, creating a Cluster of Lit Bombs that contains three armed Bombs. Players can loot the bag to obtain a Bomb.

BombSet to BlowSecured Stockpile of Pandaren SpoilsBombBombBombas soon as the Engineer diesBombBombBombMind ControlBombRepairRepair

Security Guard - Frequently drops a shield on the ground, creating a zone of Defense in which enemy creatures take 99% less damage

Bellows Operator - Increases the Heart of the Mountain's Heat levels; once Regulators die, Operators must be tanked, and will use Deafening Roar

As long as Regulators are alive, Bellows Operators are not affected by the Security Guards' Defense

Foreman Feldspar (mini-boss) - Creates Rupture zones under random players' feet; targets random players with Pyroclasm; deals moderate damage to nearby players with Hot Blooded

Foreman Feldspar > Bellows Operator > Furnace Engineer > Security GuardReturn to Table of ContentsTank Responsibilities

Pick up one Security Guard and one Furnace Engineer at the start of the fight and drag them to your assigned location

One tank should take Foreman Feldspar as well, and tank him until Rupture zones are too cumbersome in that side of the room

If Rupture becomes too invasive, tanks can meet in the middle of the room to pass Feldspar off

Move enemies out of Defense zones

If Heat Regulators die while Bellows Operators are still alive, tanks must pick up the Bellows Operators and face them away from the raid to prevent Deafening Roar damage

Damage-Dealer Responsibilities

If targeted by Bomb, or after looting the Cluster of Lit bombs, run to the nearest Heat Regulator and use the Extra Action Button

If targeted by Rupture, move away from the raid to create the Rupture zone

Interrupt the Furnace Engineers' Repair and Feldspar's Pyroclasm

Use personal damage-reduction cooldowns if targeted by Bomb just before, or after, a Blast

Healer Responsibilities

Watch the Heart of the Mountain's Energy bar to predict the timing of Blast, and use cooldowns or strong AoE healing abilities to counter it

Players with Bomb will take moderate to heavy single-target damage when the Bomb detonates

The half of the raid that is near Foreman Feldspar will take additional periodic damage from Hot Blooded, as well as Rupture and Pyroclasm damage, and will require additional healing

The Feldspar tank will take heavy damage when afflicted with several stacks of Melt Armor, and may require external CDs

If targeted by Bomb, run to the nearest Heat Regulator and use the Extra Action Button

If targeted by Rupture, move away from the raid to create the Rupture zone

Return to Table of ContentsPhase 2: The Heart Exposed

The Primal Elementalists have a Damage Shield which makes them immune to damage

Players can remove this shield by killing a Slag Elemental within 8 yards of a Primal Elementalist

One Slag Elemental spawns approximately every 45 seconds

Slag Elementals Fixate random players; the targeted player must kite the Slag Elemental to the Primal Elementalist

Slag Elementals cast Slag Bomb when they die, dealing damage to nearby players, so ranged DPS should be assigned to kill them at the appropriate time

The Primal Elementalist will gain Shields Down, becoming vulnerable to damage for a brief window of time

Shields DownShields DownReactive Earth ShieldDispel MagicPurgeDefenseMind ControlSlay ElementalElemental SlayerDefenseVolatile FireCauterize WoundsBlastBombTank Responsibilities

Tank Security Guards and Firecallers a bit away from the current Primal Elementalist target, so the Elementalist is not affected by Defense

Primal Elementalists and Slag Elementals cannot be tanked

Interrupt Firecallers' Cauterize Wounds and Lava Burst casts when possible; Firecallers can be stunned

Damage-Dealer Responsibilities

Ranged DPS should kill Slag Elementals while they are close to the current Primal Elementalist target to remove the Damage Shield

Melee DPS should kill Firecallers and Security Guards until a Primal Elementalist becomes vulnerable to damage

Focus all damage on a Primal Elementalist when its Damage Shield is removed

Interrupt or dispel the Flamecallers' Cauterize Wounds, particularly if it is being cast on the current Primal Elementalist target

Dispel the Primal Elementalists' Reactive Earth Shield before it begins to heal

When targeted by a Slag Elemental's Fixate, kite the Elemental to the current Primal Elementalist target

Use a personal survivability CD to mitigate a Slag Elemental's Burn attack, especially near Blast

If targeted by Volatile Fire, move away from the raid to avoid injuring other players

Healer Responsibilities

Tanks will take heavy damage and will need dedicated healing

Watch the Heart of the Mountain's Energy bar to predict the timing of Blast, and use cooldowns or strong AoE healing abilities to counter it

When targeted by a Slag Elemental's Fixate, kite the Elemental to the current Primal Elementalist target

Use a personal survivability CD to mitigate a Slag Elemental's Burn attack, especially near Blast

If targeted by Volatile Fire, move away from the raid to avoid injuring other players

Return to Table of ContentsPhase 3: Freedom!MeltMeltMeltBlastBloodlustHeroismTime WarpTank Responsibilities

Move the Heart of the Mountain away from any patches of Melt that spawn nearby

Drag the Heart of the Mountain to clearer areas of the room as Melt begins to fill up the available space

The off-tank should taunt when the current tank reaches 3 stacks of Heat, or when the off-tank's Heat stacks fall off

Damage-Dealer Responsibilities

Ranged DPS should spread out to limit movement for Melt

Move quickly out of Melt if it spawns beneath you

Use personal damage-reduction CDs when Blast and Melt damage overlap

Use DPS CDs to defeat the Heart of the Mountain quickly before healers are overrun

Healer Responsibilities

Tanks will take heavy peroidic damage from Heat and may require CDs and dedicated healing

Players who move slowly out of Melt will take heavy damage

Blast will occur frequently; coordinate raid CDs to cope with this heavy damage

Return to Table of ContentsLooking For Raid Difficulty

In Phase 1, only 5 Bombs are necessary to destroy each Heat Regulator. Bellows Operators also give the Heart of the Mountain less Heat while they are alive.

In Phase 2, Primal Elementalists are not protected by Damage Shield, and can simply be killed. Slag Elementals do not spawn.

In Phase 3, Blasts occur less frequently - approximately once every 20-30 seconds. Additionally, the Heart of the Mountain's Melt pools do not grow in size the way they do in higher difficulties.

BloodlustHeroismTime WarpReturn to Table of ContentsMythic DifficultyHardened Slag

The only way this can be countered is by having Priests in the raid cast Mind Control on the Security Guards; they can then use the Security Guard's Slay Elemental ability to remove the Hardened Slag buff from the Slag Elementals. This allows players to quickly kill the Slag Elementals and break through the Primal Elementalists' Damage Shield.

This means Blasts will come more frequently during this phase than on lower difficulty levels, and players must defeat Primal Elementalists quickly to save healer mana, which will be needed for the final phase of the encounter.

The raid should be sure to chain Shields Down phases together on each Primal Elementalist to speed this phase up, and may wish to use Bloodlust/Heroism/Time Warp here, although it may only help with one Primal Elementalist.

If players allow the Heat to accumulate too quickly in Phase 1, healers will be unable to keep up during Phase 2.

The raid must defeat Bellows Operators swiftly in Phase 1, and destroy Regulators as quickly as possible, to control Phase 2 Blast damage.

Bomb

Players must react very quickly to use an entire Cluster of Lit Bombs.

Additionally, the Bellows Operators will abandon their bellows duties and require tanking upon reaching 50% health, whether the Heat Regulators are disabled or not.

Return to Table of ContentsAbout the Author:Restoration Shaman@healiocentrichealiocentric ... a blog that revolves around healing

Comments

Comment by 197607

Let's skip this fight wing 2 looks easier.

Comment by Shrugtal

This fight looks like it's full of a ton of interesting mechanics as opposed to the usual format of handle two mechanics, kill adds and avoid "fire". Can't wait, great guide!

Comment by 1424640

Now excuse me but why has Blizzard decided to make encounters that force you to take in certain Classes for Mythic progression? Mind Control being necessary for the fight on Mythic, and really useful on lower difficulties seems a bit unfair to other Classes. Im not saying this is completely wrong, but it seems a weird thing to do.

Comment by Keasha

Having two priests for especially P1 is god-mode. Using Dominate Mind will help you spread the bombs in your raid faster and allow to advance into P2 quicker.

Comment by ghakajin

If you are having trouble with this fight, search youtube for blast furnace guide live server.
I can't post links yet, because I am new, but I made a thorough guide with a video of a kill on youtube. Hopefully you can find it and good luck killing him.

Comment by Casn

Notes regearding LFR difficulty are moslty wrong. Heat Regulators on LFR have 499k hp (unless I noticed it wrong and it's 399k) so take 5 bombs, and clusters still drop.
During phase 2 I don't think I've seen even single Slag Elemental, so probably not only shields but also elementals are removed.
During phase 3 Heart does go Superheated, and according to tooltip blasts occur every 6 seconds. Note that at LFR this does not cause so significant raid damage.

As a side note, on LFR Security Guards can be CCed to break their Defense, unless it's not possible to CC them on higher difficulties, that is better way of handling them than moving out.

Comment by bazzyl

Just finished my first LFR Slagworks:

Trash and Oregorger Part 1: http://youtu.be/30UWJ8Pi_3E
Oregorger Part 2: http://youtu.be/lJjcm38zIYk
Gruul: http://youtu.be/DsunktWcphI
Blast Furnance: http://youtu.be/_D2G5nfArN0

Now off to normal one :)

Comment by FriendlyFacts

For all you priests out there making full use of their Mind Control, there are a few catches to this.

First off, any mob you used Mind Control on, will receive the Infuriated buff afterwards. This is permanent and not removable. In other words, you can only mind control a mob once and it should be nuked to death shortly after to avoid unnecessary damage.

Since the first phase is more about control instead of a mad dash to get the Heat Regulator's down, mind controlling the Furnace Engineer's is generally a waste of effort. However, it does help to end a phase, so with some training and communication you can "force" the phase transition by using Mind Control on the Furnace Engineer's and manually casting Bomb on designated targets. This'll ensure a phase transition when you want it - in a perfect scenario when you've cleared most of the mobs and before new reinforcements arrive.

When the second phase arrives Mind Control is a good spell to use on the Security Guard. There are two abilities not listed on WoWhead, as well as the permanent passive of Elemental Slayer. The two abilities are a stomp-taunt and a direct damage ability that both only work on Slag Elemental. The perfect strategy is to mind control a security guard when an elemental is at low health. (Mythic difficulty will do this at full health as to remove the buff). Make sure the Slag Elemental is near a Primal Elementalist and then cast the stomp-taunt. Follow up with the Slay Elemental. The guard itself will be hitting for a substitutional amount. Melee should move out of range and let ranged DPS finish the Slag Elemental and let the security guard eat up the Slag Bomb. If this does not finish off the guard he should be nuked down thereafter.

Firecaller's are the final mob that are susceptible to Mind Control. Their noteworthy ability of Cauterize Wounds is useless when used on players. However, it can still cast Lava Burst which has a mana cost. It's possible to drain his mana this way, but it only stops future Lava Burst casts for a short while. The primary use of using Mind Control on the Firecaller is stalling all other instant spellcasts of the Firecaller which are not available to the player.

Good luck on using Mind Control!

Comment by AveryZan

I only did this on normal and this was earlier on, it may not work this way any more but it's worth looking into. That defense ability security guards do doesn't seem to work for stationary targets like the bellows/ elementalists (they seem to take full damage while it's up and in it as far as I can tell). Feel free to test and see if you come to the same conclusion.

Comment by 1194084

Some extra tip:
Slag Elementals spams Burn and stay in one place while casting Burn. If you want it to move, just interrupt Burn. The Slag elemental will move towards the player it Fixate, but it cannot do any melee attack.

If you are an MC Priest, move MCed adds near the tank before you drop MC because this makes it easier for tanks to gain threat while adds gain Infuriated once out of MC, immune to taunt and crwod control.

Comment by xJAMA33x

This really sucks that you have to have a Priest will you on Mythic difficulty for Phase 2: The Heart Exposed. Hope it gets changed sometime in the future so it is easier for people who don't have a Priest.

Comment by Crook1d

This seems to have been nerfed heavily with patch 7.3.5 on mythic difficulty.

Last week at ilvl 969 it was difficult to solo as a Rogue due to the CD of Bribe (MC). The 5 minute window was rough. I was all prepared for the same thing this week and it was a joke. You don't even need the elementals to DPS the Primal Elementalists even though doing so will be quicker and the elementals don't need their buff removed to damage them adequately.

I don't know if this was intended but it was a joy to solo.

Quick note: make sure you create an LFG group and set the loot to "Group Loot" or "Free for All" otherwise it will automatically be on personal loot even for mythic. This screwed me out of some transmog on the first boss before realizing the 7.3.5 personal loot changes effected even Mythic content for WOD.

Comment by Ayemes

Since 7.3.5 landed this has been soloable without a priest. The hp scaling has allowed enough damage to be done to negate the damage debuff from the elementalists in phase 2. It will probably still be safe to take a friend for the extra dps but it no longer has to be a priest

Blast Furnace (Blackrock Foundry) Strategy Guide

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