Thok the Bloodthirsty is the 11th encounter in the Siege of Orgrimmar and the 3rd/last encounter in The Underhold LFR.

For a detailed view of the abilities/loot table across LFR/Flex/10/25 please CLICK HERE

General Strategy/Overview

This fight is yet another 2-phase rotating fight.  However, the way one of the mechanics works, it will be up to you to determine WHEN he transitions to phase 2.  Once you enter phase 2, you will kill a jailer who drops a key, you will use this key to open 1 of 3 NPC cages around the room.  Each time you free an NPC, Thok will run over to them and eat them, granting him new abilities based on the NPC that he devours.  Once he eats the NPC he will revert back to Phase 1.  This continues until either enrage, or you kill him.

Phase 1 - Thok has an energy bar that gradually increases, when its at 100 energy, he will cast Deafening Screech.

1. Fearsome Roar (tank warning) - Does a frontal cone ability (looks similar to sound waves i.e. Atramedes from BWD).  Deals ~220k phys dmg and increases dmg taken by 50% per stack.  Requires tank swapping.
2. Deafening Screech - Screech ability that deals ~240k phys dmg to the raid and interrupts all spellcasts.  Every time he Screeches, his energy bar will fill faster, causing him to cast it faster after each cast.  This is where knowing when to push him to Phase 2 comes into play so you don't wipe to Screech.
3. Tail Lash - Tail whip ability dealing ~300k phys dmg to anyone behind him and stunning for 2 sec.  Just don't stand behind him. DUH!
4. Shock Blast - his shock collar electrifies, dealing ~80k nature dmg to random players at random times.
5. Bloodied - When players fall below 50% health, they will receive a debuff.  This debuff does no extra damage, but is used to force Thok to phase 2.  When 5 players (15 in 25-man) are below 50% health, have this debuff, and stack within 10 yards, Thok will enter "Frenzy for Blood" (aka Phase 2).

Phase 2 - Thok will fixate on random players during this phase and need to be kited.

1. Blood Frenzy - When he enters phase 2, he will enter a frenzy, and knock back any players in front of him. Anybody that gets near him will be devoured instantly and will give him a speed increase.  He is immune to taunt during this phase.
2. Fixate - Fixates on a random target.
3. Kor'kron Jailer - This mob spawns at the beginning of any phase 2.  This mob needs to be tanked, but only does basic melee damage.  Once killed, he drops a key that must be looted from his body.  The person who loots the body must release one of the NPCs from the 3 cages in the room.
4. Prisoners of War - These are the 3 named NPCs that Garrosh has captured and are in cages in the room.  Freeing one of these NPCs will cause Thok to eat them instantly and will grant him new abilities.  He will re-enter Phase 1 upon eating the NPC.
   1. Akolik - Skumblade mob.  Will try to subdue a nearby dinosaur (has unpredictable results) When eaten, Thok will gain the following P1 abilities.
      1. Acid Breath - Fearsome roar is replaced by this.  This will deal ~400k nature dmg to the players in front of him, and reduces armor by 15% pre stack.
      2. Corrosive Blood - Toxin seeps from his pores, hits random players dealing ~55k nature damage on impact and places a 30 sec DoT dealing ~16k nature dmg every 2 sec. Stacks.
   2. Waterspeaker Gorai - Jinyu NPC, will heal random players until eaten.  When eaten, Thok will gain the following P1 abilities.
      1. Freezing Breath - Fearsome roar is replaced, dealing ~220k frost dmg in a frontal cone. Gives a stacking debuff that when it reaches 5 stacks, will place the player in a tomb of ice.
      2. Icy Blood - His skin freezes and cracks, dealing~95k frost dmg to random players and coats them in a stacking ice debuff for 15 secs, dealing ~90k every 2 sec.  If a player receives 5 stacks they will be placed in a tomb of ice.
   3. Warmaster Montak - A Firesworn NPC (Yaungol?).  Will give nearby players a chance to cause additional fire dmg with their attacks.  When eaten, Thok will gain the following P1 abilities.
      1. Scorching Breath - Fearsome roar is replaced, dealing ~220k fire dmg in a frontal cone, gives a DoT giving ~65k fire dmg every 2 sec per stack.
      2. Burning Blood - Skin becomes coated in incendiary oil, dealing ~65k fire dmg to random players and leaves fire patches on the ground.

Thats it.  The fight revolves around knowing when to let your required amount of raiders drop below 50% health to force Thok into P2 before he starts to cast Deafening Screech so fast that you end up wiping.  Then kite around the boss and free the appropriate NPC that you wish to you utilize to get a little extra healing, fire dmg against the boss, or w/e the Skumblad NPC provides.  Also pay attention to debuff stacks on the tanks and know when to taunt off.  The fight is pretty straight-foreward.  Its all about pushing him at the right time and using Def CD's to avoid quick spike dmg later in the fight from Deafening Screech when you have no NPCs left to free.