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Fatboss guide: https://www.youtube.com/watch?v=RjqAdAPHbAI
Consequence guide: https://www.youtube.com/watch?v=0QC7BOEv2iE
Written guide: http://www.wowhead.com/guides/raiding/blackrock-foundry/operator-thogar-strategy-guide

The guide from Consequence is very nice because it includes pictures, the guide from Fatboss on the other hand isn't up to date imo because they say that the train doesn't move away if the adds aren't dead. On forums are topics that the train moves away even with adds up. So i prefer the guide from Consequence.

This fight will take time and have to be progressed on train by train, just get the specific pattern in your system and eventually the boss will die.

Mythic changes:

Grom'kar Firemenders gain Lava Shock, a spell with a quick cast time, that will damage and interrupt their target. This spell is cast at a random ranged target and will produce a 5-second spell school lockout if the target was casting a spell at the time the Lava Shock struck them. Lava Shock can be interrupted, or it can be redirected by effects like Grounding Totem and Mass Spell Reflection.

The first new train type that players will encounter is the Deforester train.
-A Deforester will appear approximately 25 seconds into the fight, on Track 1.
-This train slowly moves across the platform, shooting a massive column of flames.
-The Heat Blast will reach all the way across the encounter area, so there are no safe spots.
- Heat Blast stacks a DoT effect, Burning, on players every 0.5 seconds
-More than 2 stacks of Burning is likely to be fatal.
-Players should group together and use speed boosts, immunities, and damage-reduction cooldowns to run through the flames.
-Teleporting abilities such as Blink and Displacer Beast will allow the player to avoid gaining any stacks of Heat Blast.
-Demonic Gateway will allow a player to move through the Heat Blast while gaining only one stack.
-After the raid has passed through Heat Blast, players should stay loosely clumped for healing CDs.

Approximately one minute into the fight, three of the four train doors will open, and only one track will be safe. The trainless track will be either Track 2 or Track 3, so players should be prepared to move to whichever of these tracks is safe.

Twenty seconds later, when trains arrive on Tracks 1 and 4 simultaneously, players will encounter the second new type of weapon, the Obliterator Cannon


-The Obliterator Cannon accompanies an Iron Gunnery Sergeant on Track 4.
-Every five seconds, the Obliterator Cannon will fire OBLITERATION at a predetermined location, starting with Tracks 2 and 3.
-The projectiles will deal damage to players standing at the point of impact.
-OBLITERATION also leaves patches of fire on the ground, which persist for 20 seconds and afflict any players who pass through with Burning.
-Players must move out of the ring before the projectiles land, to avoid taking damage from this mechanic.

While the Obliterator Cannon is active, the raid's movement will be heavily constrained. Shortly after OBLITERATION begins, a train will travel down Track 2, and players must carefully dodge the train while being careful not to gain any stacks of Burning.

Following the Obliterator Cannon, the fight continues as normal, with the simultaneous Track 2 and Track 3 trains appearing, requiring the raid to split up, about two minutes into the fight.

Deforester and Obliterator Cannon may appear again later in the Mythic encounter, but can be handled in the same way.

Mage pov: https://www.youtube.com/watch?v=JSGM9e_pk1c
Hunter pov: https://www.youtube.com/watch?v=efofw4K3nX0
Balance pov: https://www.youtube.com/watch?v=1583KZ77c_U
Shadow pov: https://www.youtube.com/watch?v=5Nt6iY35sv8
Warlock pov: https://www.youtube.com/watch?v=rZqsEYDsOaM
Elemental pov: https://www.youtube.com/watch?v=SVXuBJg2c30
Rogue pov: https://www.youtube.com/watch?v=K80EEPiDKRM
Retri pov: https://www.youtube.com/watch?v=cfFk8mAv7wk
Fury pov: https://www.youtube.com/watch?v=AbED2DFpefk
Unholy pov: https://www.youtube.com/watch?v=qXID6SO4VPI

Resto druid pov: https://www.youtube.com/watch?v=mxrbNh_l8lQ
Resto shaman pov: https://www.youtube.com/watch?v=QYu2mxB_Eso
Holy pala pov: https://www.youtube.com/watch?v=_gG0DNEs1NI
Disc pov: https://www.youtube.com/watch?v=7tJhY8tRW8k
Mistweaver pov: https://www.youtube.com/watch?v=kd7I3TkMFNU (this is the girl from the Consequence guide)

Blood dk pov: https://www.youtube.com/watch?v=0z-D0cJzVqY
Prot warrior pov: https://www.youtube.com/watch?v=YVQGwyZoI7Q
Prot pala pov: https://www.youtube.com/watch?v=GS_q_wYrElk

Have fun watching and thnaks for reading!

Regards prinsy

From start to end.
1

2: Run trough fire asap, use speedincrease, portal, blink, disengage etc to minimize stacks.

3: fire is showed here. try to get 1 stack only, ticking debuff!

4

5

6

7: Next slide: only ranged move almost to Blue and back.

8

9: Boss should be low when we are on skull, fuck adds, nuke boss!


10: This is a complete overview:


Regards,
Prinsy