

Garrosh is a 3-phase fight with intermissions.
P1 lasts until he reaches 10% health and starts the first intermission.
P2 also lasts until he reaches 10% health, and every 2.5 minutes during P2, he sends the raid to another intermission.
P3 lasts until Garrosh dies.
Heroic has an additional P4 after Garrosh reaches 0% health in P3.
In P4, Garrosh sends the raid to Stormwind Harbor and has a few new abilities.
During P1: Kor'kron Warbringers fixate on players and can no longer be tanked.
The intermission order is set: Temple of the Jade Serpent -> Terrace of Endless Spring -> Temple of the Red Crane.
Embodied Doubt, Embodied Fear, and Embodied Despair adds in the intermissions have additional abilities.
During P2/P3, Minions of Y'Shaarj gain 10 Energy every time they melee. Upon reaching 100 Energy, they gain Empowering Corruption.
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Phase One lasts until Garrosh reaches 10% health. During this phase, he only uses Desecrate and Hellscream's Warsong.
There are also three types of adds to deal with.
Kor'kron Warbringers and Farseer Wolf Riders spawn roughly every 40 seconds.
Always focus the Farseer Wolf Riders first.
The Siege Engineers summon Exploding Iron Stars, which one-shot any players caught.
You need to kill at least one Engineer to survive the impact.
RANGED
BAIT AND MOVE
Garrosh targets a random ranged player with Desecrate, spawning a Desecrated Weapon at their position.
This weapon has a large void zone around it, dealing damage to any players within. The zone shrinks as the weapon's health is reduced.
You do not have to kill the weapons, but it will reduce the area you can play the fight in.
EVERYONE
KILL ENGINEER, WATCH IRON STAR
Two Siege Engineers spawn, one on each side of the room. They start summoning an Iron Star.
You need to kill one Siege Engineer (either ranged or rogue players can shadow step up), and let the other one go through.
You can use the summoned Exploding Iron Star to deal damage to adds, but any players caught in its path will die to the Iron Star Impact.
Garrosh buffs any adds alive, increasing their damage done and health by 150%.
Cast roughly every 30 seconds.
Farseer Wolf Riders cast Ancestral Chain Heal and Chain Lightning.
Every time they get interrupted, they gain a stack of Ancestral Fury, giving them 25% increased cast speed.
Try to only interrupt the Chain Heal to prevent excessive stacks of Ancestral Fury.
Garrosh buffs any adds alive, increasing their damage done and health by 150%.
Cast roughly every 30 seconds.
Farseer Wolf Riders cast Ancestral Chain Heal and Chain Lightning.
Every time they get interrupted, they gain a stack of Ancestral Fury, giving them 25% increased cast speed.
Try to only interrupt the Chain Heal to prevent excessive stacks of Ancestral Fury.
After Garrosh reaches 10% health, he heals to full and sends the raid into the Realm of Y'Shaarj. This phase lasts for 1 minute.
You'll be transported to Temple of the Jade Serpent, Temple of the Red Crane, or Terrace of Endless Spring.
Adds depend on where you are teleported. In Jade Serpent and Red Crane, the raid will have to split up.
Garrosh is immune to damage while adds are alive. He is absorbing energy, so the faster you finish the intermission, the less energy he gains for Phase Two.
EVERYONE
MOVE FROM FRONTAL
While any adds in the realm is alive, Garrosh is immune to damage.
Once he is engaged, he starts casting Annihilate, which is a frontal cone dealing lethal damage to anyone hit.
EVERYONE
KILL ADD
Embodied Doubt is in the Temple of the Jade Serpent.
These are grouped in packs, and the raid should be assigned to split up to deal with them effectively.
In Heroic, they also cast Embodied Doubt, which needs to be INTERRUPTED!
This deals a large amount of raid-wide damage, and gives everyone a stacking debuff increasing damage taken from future Embodied Doubt casts.
When they die, they buff any nearby players with Consumed Faith.
EVERYONE
KILL ADDS
Embodied Fear is in Terrace of the Endless Spring.
When they die, they buff any player in a small radius with a buff that decreases damage taken by 50%.
There are a lot of these adds, but their health is low.
On Heroic, they also cast Crushing Fear, which causes swirlies on the floor for the raid to dodge.
Embodied Despair is in the Temple of the Red Crane. Upon death, these buff in a small range.
There are two Embodied Despairs in the temple, so the raid needs to split into two to deal with them.
On heroic, you are unlikely to see this phase, as you'll want to have finished P2 before Garrosh sends you to the 3rd intermission.
If you do, it's a likely wipe - but the Embodied Despair adds will cast Ultimate Despair, which needs to be interrupted.
Embodied Despair is in the Temple of the Red Crane. Upon death, these buff in a small range.
There are two Embodied Despairs in the temple, so the raid needs to split into two to deal with them.
On heroic, you are unlikely to see this phase, as you'll want to have finished P2 before Garrosh sends you to the 3rd intermission.
If you do, it's a likely wipe - but the Embodied Despair adds will cast Ultimate Despair, which needs to be interrupted.
After 1 minute in the intermission, Garrosh returns to the normal realm. He has healed fully, but any damage dealt during the intermission stays.
During P2, Garrosh has an energy bar that slowly empowers his normal abilities.
Roughly every 2.5 minutes during P2, Garrosh pulls the raid back into the Realm of Y'Shaarj, where you have to repeat the intermission phase.
EVERYONE
MOVE AWAY TO REDUCE DAMAGE
Garrosh channels a whirlwind attack for 6 seconds, dealing damage to the entire raid. Damage is reduced the further away you are.
At 25 Energy, Whirling Corruption becomes Empowered.
It now also shoots at random raid members, dealing high damage in an 8-yard range around the target, and summoning a Minion of Y'Shaarj.
Empowered Whirling Corruption also heals all Minion's of Y'Shaarj to full health.
EVERYONE
INTERRUPT AND DPS DOWN MCS
Garrosh mind controls random players.
While they are mind-controlled, they try to cast Touch of Y'Shaarj on other raid members, which will also mind-control them if successful.
MCed players can be interrupted, and the MC breaks when they reach 20% health.
At 50 Energy, Garrosh turns this into Empowered Touch of Y'Shaarj. Players MCed with this are immune to CC and have increased health.
RANGED
STACK TO BAIT
This works like Desecrate in P1, where Garrosh targets a random ranged member, casting a weapon on them, which creates a large void zone.
This zone deals damage to any players within. The zone shrinks as the weapon's health is reduced.
You do not have to clear the weapons, but it will reduce the area you can play the fight in.
It is recommended to stack up as Ranged to control where the Desecrated Weapons spawn.
At 75 Energy, Desecrate becomes Empowered. This makes the weapon heal over time and become unkillable.
Minion of Y'Shaarj spawns from Empowered Whirling Corruption. They have no abilities, and only melee, but when they die, they cast Empowering Corruption.
This is a stackable buff, healing other Minions of Y'Shaarj to full health and granting them 200% increased maximum health and damage.
You can kite these adds to deal with them.
Minion of Y'Shaarj spawns from Empowered Whirling Corruption. They have no abilities, and only melee, but when they die, they cast Empowering Corruption.
This is a stackable buff, healing other Minions of Y'Shaarj to full health and granting them 200% increased maximum health and damage.
You can kite these adds to deal with them.
When Garrosh reaches 10% health at the end of Phase 2, he heals back up to 25% and starts P3.
In P3, he only uses the 4 Empowered abilities from the previous phase.
This phase lasts until he reaches 0% health.
RANGED
STACK AND MOVE FROM MINIONS
Garrosh channels a whirlwind attack for 6 seconds, dealing damage to the entire raid. Damage is reduced the further away you are.
It now also shoots at random raid members, dealing high damage in an 8-yard range around the target, and summoning a Minion of Y'Shaarj.
Empowered Whirling Corruption also heals all Minion's of Y'Shaarj to full health.
DPS
FOCUS MCED PLAYERS
While they are mind-controlled, they try to cast Touch of Y'Shaarj on other raid members, which will also mind-control them if successful.
During P3, players MCed are immune to CC, have increased health, and the MC breaks when they reach 20% health.
RANGED
BAIT DESECRATE WEAPON
This works like Desecrate in P1 and P2, where Garrosh targets a random ranged member, casting a weapon on them, which creates a large void zone.
This zone deals damage to any players within. The zone shrinks as the weapon's health is reduced.
You do not have to clear the weapons, but it will reduce the area you can play the fight in.
It is recommended to stack up as Ranged to control where the Desecrated Weapons spawn.
In P3, Desecrate becomes Empowered. This makes the weapon heal over time and become unkillable.
After reaching 0% in Heroic P3, Garrosh starts a 20-second RP, and teleports the raid to Stormwind Harbor.
He heals back up to 60%, and the fight is over once he reaches 0%.
He slowly gains Energy throughout this phase, and at 100 Energy, he casts Manifest Rage.
Make sure to have an Iron Star to interrupt the boss!
SOAK THE DEBUFF
IN GROUPS
Garrosh applies a 15-second long debuff on a random player. This deals damage to 2 (10-man) / 5 (25-man) nearby players and applies a stack of Malicious Blast.
This increases the damage taken by Malice, so make sure to rotate who soaks a stack.
If this debuff does not hit any players, the entire raid takes a lot of damage, and Garrosh gains 5 Energy.
Assign soak teams and move the debuff around!
EVERYONE
MOVE FROM FIRE
ASSIGN A PLAYER
TO KITE THE IRON STAR
Right after casting Bombardment, Garrosh checks for "stacked" players. If at least 3 (10-man) / 7 (25-man) players are stacked within a 8-yard radius, he spawns an Iron Star on that location.
The Iron Star falls from the sky, and deals massive damage.
It fixates on the closest player, which must kite it around to run it into Garrosh when he reaches 100 Energy and casts Manifest Rage.
USE IRON STAR
TO INTERRUPT
When Garrosh reaches 100 Energy in this phase, he starts channeling Manifest Rage.
This spell spawns many adds called Manifestation of Rage, which have no abilities and can be tanked.
You should use the Iron Star to interrupt Garrosh!