Grim Batol ( instance ) Grim Batol is a dungeon in the Grim Batol complex revealed in " " . Background . " During a bloody civil war among the three dwarven factions of Ironforge , the Bronzebeard s ousted the Wildhammer and the Dark Iron clans from the ancient corridors of the mountain city . In the wake of the defeat , the Wildhammers ventured north and forged a new home , Grim Batol , in the mountains of what is now the Twilight Highlands . However , although they worked tirelessly to create a better future for themselves , the Dark Irons , who established the city of Thaurissan in the Redridge Mountains , could not move beyond the memory of their defeat . Consumed by the desire for revenge and desperate to control the entire dwarven region of Khaz Modan , the Dark Irons led a two - pronged assault on the Bronzebeards in Ironforge and the Wildhammers in Grim Batol . Despite their past differences , these two embattled rivals joined forces and drove the Dark Irons out of Khaz Modan , decimating the armies of the treacherous clan ' s sorcerer - thane , Thaurissan . Yet victory carried grave consequences . Although Thaurissan ' s wife and queen , Modgud , was slain during the attack on Grim Batol , her death tainted the mountain fortress . While the Bronzebeards rebuilt their glorious city of Ironforge , the Wildhammers felt forever changed by the horrors they witnessed at Grim Batol . They fled their cursed home and never returned . " " The abandoned city ' s defiled corridors later became home to a number of nefarious plots . When the Demon Soul was discovered by the Dragonmaw clan and used to force Alexstrasza ' s drakes to serve the Horde , Grim Batol acted as the red Dragon Aspect ' s torturous prison . The Dragonmaw held Grim Batol through the Second War , before they were driven out by Deathwing , who planned to steal Alexstrasza ' s eggs . Yet as Deathwing carried out his plan , the Demon Soul was destroyed , and the powers locked within were returned to Alexstrasza , Ysera , Nozdormu , and Malygos . Deathwing narrowly escaped an assault by the four re - empowered Dragon Aspects , although he did not leave empty - handed ; in his grasp were the eggs of Alexstrasza . For their vile transgressions , the fleeing Dragonmaw were shown no mercy , and the struggle came to a quick end . Members of the red dragonflight were left behind to keep watch over Grim Batol , and for years they successfully guarded its desolate halls from further intrusion . . . until the arrival of the Twilight ' s Hammer , a sinister cult who worshipped Azeroth ' s malefic Old Gods . " " The cult , seduced by Deathwing ' s thirst for absolute domination over Azeroth , has claimed the Twilight Highlands as its base of operations . The black dragonflight has driven off the agents of the red dragonflight who guarded Grim Batol so that it may be used as a fortress for training Deathwing ' s minions . The halls of Grim Batol run so deep into the highlands that it is unknown to what twisted end the Twilight ' s Hammer is using this doomed dwarven marvel . " " Called to action by the red dragonflight in the Twilight Highlands , players will be charged with putting a decisive end to the foul machinations developing within the level - 85 , 5 - player dungeon of Grim Batol . The ferocity of the enemies within should not be underestimated , and with the assistance of brave Red Drakes and a handful of explosives , players can thin the ranks of Grim Batol ' s occupiers through bombing flights into the ruined city ' s corridors . Regardless of how successful these attacks might be , General Umbriss will not allow his army to fall so quickly . In the end , adventurers will be left to their own devices , venturing into the darkest recesses of the dwarven fortress , where a nightmarish enemy is taking shape . Will you be able to uncover Grim Batol ' s secrets and emerge unscathed , or will your destiny be sealed within this tortured city , like so many brave heroes before you ? " Encounters . Dropping bombs . After several trash mobs , you will mount a dragon and follow a set flight path , dropping bombs on the mobs below to lower their health . After your flight is complete , you will return to where you mounted the dragons and kill the mobs you weakened . " Strategy : " This boss is has a fairly simple strategy . After you engage him , he will summon adds partway through the fight , and multiple times after if allowed to do so . Four adds will spawn . Three of these adds ( the normal troggs ) should be killed , and the fourth ( malignant trogg ) should be cc ' ed or dealt with by an offtank . Killing this trogg near the boss , he will gain a 100 % damage bonus ( according to wowhead . ) Holding the malignant trogg instead of killing it prevents more adds from spawning . At 30 % Umbriss goes into a Frenzy - he will get a 50 % speed bonus and a 50 % damage bonus , but he will stop sumoning adds , even if you kill the malignant trogg . During the encounter , players should avoid General Umbriss ' s Blitz attack , in which he targets a random player and charges them . This attack causes around 30k in physical damage and makes the player airborne , causing more damage when they land . He will also cast Ground Siege at a random player , causing about 35k in damage and stunning the target . " Attacks : " Source : " Strategy : " Strategy is dependant on the weapon he equips . Some general reminders are to avoid the Cave - ins caused by Throngus ' s Mighty Stomp , and to avoid any ground aoe . " Attacks : " Shield Abilities Swords Abilities Mace Abilities Source : " Strategy and attacks : " Phase 1 : Caster Phase Phase 2 : Dragon Phase Source : " Strategy : " Source : " Attacks : " Source : Reputation . Defeating all the bosses in the instance and skipping the relatively standard number of Trash mob groups should yield about 1560 Reputation with a Tabard , before the Human racial passive Diplomacy and the Guild Perk - Mr . Popularity are taken into account . Geography . Location : Twilight Highlands . Northwestern portion , north of the Bastion of Twilight and south of the Vermillion Redoubt . It ’ s exactly where it was before the Shattering , just now designated as part of the Twilight Highlands instead of Wetlands . Trivia . Grim Batol seems to re - use Ironforge ' s design and architecture , much like Shadowforge City and Thor Modan . External links . Very short , copy - and - pasteable tactics for Grim Batol - MMO Melting Pot