Dark Coffer " This page was created pre - TBC . The information is from a lvl 60 point of view and may be neither accurate nor relevant anymore . " The Dark Coffer is one of the major reasons high - level characters are still raiding Blackrock Depths . Basically , it is a chest with various valuable items including greens and gems . However , the main reason to visit the safe is the Burning Essence , which is needed for the + 20 Fire Resistance Libram Enchantment for your Head / Leg slot as you progress through the Molten Core . Casters may also want to get the Black Blood of the Tormented , for the + 150 Mana enchantment . The Coffer Run . Preparation . Before you head off to BRD you should consider the following : Getting to the Dark Coffer Room . After entering the Blackrock Depths , turn left and have the gate opened either by a rogue or with the Shadowforge Key . Kill or avoid the fire elemental , opening the next gate to the right . Unlock the door and enter the Shadowforge Lock room . Watch out for roaming fire elementals up the stairs . On top of the stairs run straight forward and enter the top level of the arena . With the arena event uncompleted , all spectators will aggro . However , they can be avoided by hugging the inner ledge while crossing the room . Tauren can also try to step upon the ledge to gain even more distance to the spectators . Once on the other side , fight to the Coffer Room . Turn left and fight to the large Bridge ( watch out for the " ambush event " ) and enter the Domicile . One can try to cross the room to the set of stairs to the left side in the back of the room without aggoing any mobs on the way , but most suggest taking the groups out regularly . Fight through the Domicile to a round - shaped room on a semi - circular ledge . Lord Incendius is below . The Dark Coffer room is beyond the next entrance along the ledge . Go inside the room and clear any mobs . In the back is the Dark Coffer at the center of the wall ( along with numerous Relic Coffers , openable for minor loot using Relic Coffer Key s ) . Be careful though , since the 4 golems will come to life and attack once all Relic Coffers are open . So where is the Key ? If you have come so far , you will stand in front of the Dark Coffer and have no idea of how to open it . The key is held by a Dark Keeper , which can be found inside the instance . However , he only spawns after you examine the picture which is located inside the Coffer Room ( really hard to miss ) . Dark Keeper Locations . Once you examine the picture a Dark Keeper will spawn at a location which is pointed out within the text . However , the hints given are not very helpful for people who don ' t know the Blackrock Depths that well , so here are the different locations of the possible Keeper spawns : Dark Keeper Bethek Dark Keeper Ofgut Dark Keeper Pelver Dark Keeper Uggel Dark Keeper Vorfalk Dark Keeper Zimrel The Dark Coffer Loot . Dark Coffer Loot table http : / / wow . allakhazam . com / db / object . html ? wobject = 322 # Known _ Drops Once you have killed the Keeper , loot the Key and return to the Coffer Room to open the Dark Coffer . One of the most desirable items the coffer has been found to contain is one or two Burning Essence s .