As the grand Imperator of Highmaul, Mar'gok is descended from a long line of sorcerers who have ruled the Gorian Empire. Equal parts cunning and brutality, Mar'gok recognized the rising tide of the Iron Horde and what it would mean to oppose them. He has acquiesced to an alliance with Grommash, even as he continues to search for a way to tip the balance of power back into his favor.
Overview
Imperator Mar'gok assaults players with destructive Arcane magic and summons Arcane Aberrations to fight for him. When Imperator Mar'gok reaches 85%, 55% and 25% health remaining, he activates one of the runestones in his throne room, augmenting his abilities with additional effects. The runestones activated at 55% and 25% must be awakened from their dormant state. As they charge, guards arrive to defend the Imperator as Volatile Anomalies pour from the stone.
In Mythic difficulty, Imperator Mar'gok maintains the effects of 2 runestones at once and begins to awake a new runestone at 66% and 33% health remaining.
Damage Dealers
Arcane Wrath spreads to nearby allies.
Destructive Resonance will inflict lethal damage if triggered.
Arcane Aberrations inflict heavy raid wide damage as long as they are alive.
Healers
Arcane Wrath inflicts heavy damage when it expires from a target.
Arcane Aberrations will inflict raid wide damage every second that they are alive.
Force Nova inflicts heavy damage to players as it moves over them.
Tanks
Accelerated Assault will stack indefinitely until Imperator Mar'gok melee attacks a different target.
Mark of Chaos will inflict damage to allies within 35 yards when it expires.
Imperator Mar'gok will periodically summon Arcane Aberrations.
Abilities
Phase 1: Might of the Crown
Arcane Wrath — Imperator Mar'gok blasts a random player with Arcane energy, branding them for 4 sec. When Branded expires it inflicts 61750 to 68250 Arcane damage to the wearer and jumps to their closest ally within 200 yards. Each time Arcane Wrath jumps, its damage increases by 25% and range decreases by 50%.
Destructive Resonance — Imperator Mar'gok summons an Arcane mine that persists for 1 minute. If triggered, Destructive Resonance inflicts 84000 Arcane damage to all players. In addition, this effect inflicts 186200 to 205800 Arcane damage to the player that triggered it, increasing their Arcane damage taken by 45% for 1 min and stunning them for 1.50 sec whenever they take Arcane damage.
Arcane Aberration — Imperator Mar'gok summons an Arcane Aberration.
Collapsing Entity — Arcane Aberrations pulse with unstable energy, inflicting 11875 to 13125 Arcane damage to all players every second.
Mark of Chaos — Imperator Mar'gok marks a player with chaotic magic. After 8 sec., the magic explodes, inflicting 237500 to 262500 Arcane damage to their allies within 35 yards.
Force Nova — Imperator Mar'gok releases a nova of Arcane energy that inflicts 15795 to 16605 Arcane damage every 0.3 sec. to all players within the nova's area of effect.
Accelerated Assault — With each consecutive melee attack against the same target, Imperator Mar'gok's attack speed increases by 8%. This effect stacks.
Phase 2: Rune of Displacement
When Imperator Mar'gok reaches 85% health remaining, he activates the Rune of Displacement. In Mythic difficulty, Imperator Mar'gok begins the fight with both the Rune of Displacement and Rune of Replication active.
Arcane Wrath: Displacement — In addition to Arcane Wrath's normal effects, Branded Players are unable to move more than 10 yards from the location they were marked. Attempting to leave the marked area will teleport the player back to the location they were originally marked.
Destructive Resonance: Displacement — In addition to Destructive Resonance's normal effects, it grows to twice its original size over 30 seconds.
Displacing Arcane Aberration — Imperator Mar'gok summons a Displacing Arcane Aberration.
Impactful Pulse — Upon death, Displacing Arcane Aberrations knock all players away.
Mark of Chaos: Displacement — In addition to Mark of Chaos' normal effects, the target is teleported to a random location.
Force Nova: Displacement — In addition to Force Nova's normal effects, it now also pushes players away as the nova moves outwards.
Intermission: Dormant Runestones
When Imperator Mar'gok reaches 55% health remaining, he begins to awaken the Rune of Fortification. The rune charges for 1 minute before releasing its power. In Mythic difficulty, Imperator Mar'gok begins to awaken the Rune of Fortification at 66% health remaining. This causes the Rune of Replication to become dormant.
Gorian Warmage — Two Gorian Warmages come to defend Imperator Mar'gok as he charges the Rune of Fortification.
Dominance Aura — Empowers allies within 25 yards, increasing damage done by 50% and melee, ranged and spell casting speed haste by 50%.
Nether Blast — Gorian Warmages blast a player with arcane energy, inflicting 61750 to 68250 Arcane damage to any player within 5 yards.
Nether Energy — Each succesful[sic] cast of Nether Blast increases all damage done by 25% for 6 sec. This effect stacks.
Slow — Gorian Warmages slow a random player, reducing their movement, attack and spell casting speed by 50% for 45 sec.
Fixate — Gorian Warmages fixate on a random player, attacking only them for 15 sec.
Volatile Anomaly — As the Rune of Fortification charges, Volatile Anomalies pour from the rune stone every 12 sec.
Destabilize — Volatile Anomalies explode upon death, inflicting 38000 to 42000 Arcane damage to all players.
Phase 3: Rune of Fortification
Arcane Wrath: Fortification — In addition to Arcane Wrath's normal effect, the jump range of Arcane Wrath is only decreased by 25% with each jump.
Destructive Resonance: Fortification — In addition to Destructive Resonance's normal effects, it persists for 2 minutes.
Fortified Arcane Aberration — Imperator Mar'gok summons a Fortified Arcane Aberration.
Fortified — Fortified Arcane Aberrations are immune to all crowd-controlling effects and have 75% more health.
Mark of Chaos: Fortification — In addition to Mark of Chaos' normal effects, the target is rooted in place.
Force Nova: Fortification — In addition to Force Nova's normal effects, an additional nova is released every 8 sec,. for 16 sec.
Intermission: Lineage of Power
When Imperator Mar'gok reaches 25% health remaining, he begins to awaken the Rune of Replication. The rune charges for 1 minute before releasing its power. In Mythic difficulty, Imperator Mar'gok begins to awaken the Rune of Replication at 33% health remaining. This causes the Rune of Displacement to become dormant.
Gorian Reaver — A Gorian Reaver comes to defend Imperator Mar'gok as he charges the Rune of Replication.
Devastating Shockwave — Gorian Reavers send a wave of force in a frontal cone, inflicting 237500 to 262500 Physical damage to all players within 0 yards.
Crush Armor — Gorian Reavers crush a player, increasing their Physical damage taken by 15% for 25 sec. This effect stacks.
Kick to the Face — Gorian Reavers kick a player in the face, inflicting 190000 to 210000 Physical damage. This effect clears all threat and knocks the target back.
Gorian Warmage — Two Gorian Warmages come to defend Imperator Mar'gok as he charges the Rune of Replication.
Dominance Aura — Empowers allies within 25 yards, increasing damage done by 50% and melee, ranged and spell casting speed haste by 50%.
Nether Blast — Gorian Warmages blast a player with arcane energy, inflicting 61750 to 68250 Arcane damage to any player within 5 yards.
Nether Energy — Each succesful cast of Nether Blast increases all damage done by 25% for 6 sec. This effect stacks.
Slow — Gorian Warmages slow a random player, reducing their movement, attack and spell casting speed by 50% for 45 sec.
Fixate — Gorian Warmages fixate on a random player, attacking only them for 15 sec.
Volatile Anomaly — As the Rune of Fortification charges, Volatile Anomalies pour from the rune stone every 12 sec.
Destabilize — Volatile Anomalies explode upon death, inflicting 38000 to 42000 Arcane damage to all players.
Phase 4: Rune of Replication
Arcane Wrath: Replication — In addition to Arcane Wrath's normal effects, a second player will be Branded the first time Arcane Wrath jumps.
Destructive Resonance: Replication — In addition to Destructive Resonance's normal effects, two additional Destructive Resonances are created nearby when it detonates or expires.
Replicating Arcane Aberration — Imperator Mar'gok summons a Replicating Arcane Aberration.
Replicate — Upon death, Replicating Arcane Aberrations split into 7 Arcane Remnants.
Mark of Chaos: Replication — In addition to Mark of Chaos' normal effects, 8 Orbs of Chaos are conjured when Mark of Chaos expires. Each orb flies out from the wearer and inflicts 190000 to 210000 Arcane damage to all players that they move through.
Force Nova: Replication — In addition to Force Nova's normal effects, players who are damaged by Force Nova will inflict 16625 to 18375 Arcane damage to their allies within 4 yards.
Strategy
Please add any available information to this section.
High Councilor Mal'gris yells: My liege, the city is lost! We must abandon the palace!
Imperator Mar'gok yells: Highmaul will never fall. The Gorian empire will not be overthrown by these peasants!
High Councilor Mal'gris yells: The gates have been breached! They have come for the stones!
Imperator Mar'gok yells: End this now, Mal'gris. Remove them from my throne room.
Gorian War Council defeated
You dare assault the seat of my power? Is this the work of that traitor Cho'gall? Kneel and swear fealty to me, and I may yet spare your lives for my coliseum.
Aggro
You will learn why I am king and you are little more than peasants.
Force Nova
I command the arcane!
Mark of Chaos
Begone from my sight.
Come, see the error of your ways.
Arcane Wrath
You have earned my wrath!
My power knows no limit!
Arcane Aberration
The arcane bends to my will, as shall you!
Rune of Displacement
Look upon the tools of your demise! The ancient stones grant me unimaginable power!
Rune of Fortification
You have seen but a fraction of my power. Behold the ancient magics unearthed by my empire!
King's guard, to my side! I must focus my power and awaken the stone!
Such power! It takes form to destroy you!
Its energy overflows! Soon it will be unleashed!
The boundless power of the stones flows through me! Your destruction comes!
Rune of Replication
Enough! Long have the Sorcerer Kings guarded these chambers. Today you will see our secret power.
Guards, remove these peasants.
Its power grows beyond comprehension!
You can never challenge my rule! I command the power of the stones and know no equal!
Killing a player
Your presence bores me.
Learn your place.
Berserk
I tire of this. Begone!
Death
I... am... king...
Cho'gall Encounter (Mythic only)
Cho'gall yells: You know nothing of the power you meddle with, Mar'gok. (It calls to us. We know! Its power will be ours!)
Cho'gall appears and ensnares Mar'gok in a field of dark magic.
Imperator Mar'gok yells: Cho'gall?! Traitorous scum - I knew you were behind this!
Cho'gall yells: Your reign has come to an end, the infinite night begins. (Darkness comes!)
Cho'gall draws the power of the Stones, channeling them through Mar'gok, killing him in the process.
Imperator Mar'gok yells: I... am... king...
Cho'gall yells: We have waited long for this moment. The true power of the Stones shall be realized at last! (None shall survive! We shall be the unmaking! Destroy them! Wash over this world!)
Cho'gall Abilities
Glimpse of Madness
Cho'gall yells: Gaze into the abyss! (It sees you! It knows...)
Enveloping Night
Cho'gall yells: Your world will be swallowed in darkness! (All will hear his call!)
Infinite Darkness
Cho'gall yells: Death comes! (We know it well.)
Dark Star
Cho'gall yells: The end draws closer! (This is our purpose!)
Berserk
Cho'gall yells: The night consumes us! (We have won! All will be as foretold!)
Killed a player
Cho'gall yells: Embrace the end.
Cho'gall yells: Give in to darkness.
Death
Cho'gall yells: He comes... (You can never escape...)
Hotfix (2015-01-13):Gorian Warmage's Fixate ability should now only cause the targeted player to drop out of stealth instead of incorrectly causing all steathed players in the raid to drop out of stealth.
Hotfix (2015-01-09):Councilor Gorluk's Phantasmal Weapons should no longer cause all players in the zone to go into combat.
Imperator Mar'gok
In Mythic difficulty, Imperator Mar'gok maintains the effects of 2 runestones at once and begins to awake a new runestone at 66% and 33% health remaining.
Damage Dealers
Healers
Tanks
Arcane Wrath — Imperator Mar'gok blasts a random player with Arcane energy, branding them for 4 sec. When Branded expires it inflicts 61750 to 68250 Arcane damage to the wearer and jumps to their closest ally within 200 yards. Each time Arcane Wrath jumps, its damage increases by 25% and range decreases by 50%.
Destructive Resonance — Imperator Mar'gok summons an Arcane mine that persists for 1 minute. If triggered, Destructive Resonance inflicts 84000 Arcane damage to all players. In addition, this effect inflicts 186200 to 205800 Arcane damage to the player that triggered it, increasing their Arcane damage taken by 45% for 1 min and stunning them for 1.50 sec whenever they take Arcane damage.
Collapsing Entity — Arcane Aberrations pulse with unstable energy, inflicting 11875 to 13125 Arcane damage to all players every second.
Mark of Chaos 
Force Nova — Imperator Mar'gok releases a nova of Arcane energy that inflicts 15795 to 16605 Arcane damage every 0.3 sec. to all players within the nova's area of effect.
Accelerated Assault 
Impactful Pulse — Upon death, Displacing Arcane Aberrations knock all players away.
Dominance Aura — Empowers allies within 25 yards, increasing damage done by 50% and melee, ranged and spell casting speed haste by 50%.
Nether Blast — Gorian Warmages blast a player with arcane energy, inflicting 61750 to 68250 Arcane damage to any player within 5 yards.
Nether Energy — Each succesful[sic] cast of Nether Blast increases all damage done by 25% for 6 sec. This effect stacks.
Slow 
— Gorian Warmages slow a random player, reducing their movement, attack and spell casting speed by 50% for 45 sec.
Fixate — Gorian Warmages fixate on a random player, attacking only them for 15 sec.
Destabilize — Volatile Anomalies explode upon death, inflicting 38000 to 42000 Arcane damage to all players.
Devastating Shockwave — Gorian Reavers send a wave of force in a frontal cone, inflicting 237500 to 262500 Physical damage to all players within 0 yards.
Crush Armor — Gorian Reavers crush a player, increasing their Physical damage taken by 15% for 25 sec. This effect stacks.
Kick to the Face — Gorian Reavers kick a player in the face, inflicting 190000 to 210000 Physical damage. This effect clears all threat and knocks the target back.
Replicate — Upon death, Replicating Arcane Aberrations split into 7 Arcane Remnants.
Please add any available information to this section.
[Imperator's Fall]
[Lineage of Power]
Hotfix (2015-01-13): Gorian Warmage's Fixate ability should now only cause the targeted player to drop out of stealth instead of incorrectly causing all steathed players in the raid to drop out of stealth. 
