Burning FelguardBurning Felguards are rare mobs encountered while Scarshield Warlocks are summoning minions through their portals. Typically Imps will come out, but occasionally a rare Felguard will appear instead.
Spirestone ButcherSpirestone Butcher is a rare spawn in the hallway where Highlord Omokk resides. The Butcher is a level 57 elite, who spawns as a part of the group of mobs before Highlord Omokk. The rare ogre should be handled first before focusing on the other members of the pack.
Spirestone Battle LordSpirestone Battle Lord is a rare spawn who will replace another melee mob in a group before High Lord Omokk's room. Try to CC the casters in their group and focus down the Battle Lord.
Spirestone Lord MagusSpirestone Lord Magus is a rare spawn in Lower Blackrock Spire, who replaces one of the typical mobs who would spawn before Omokk.
Highlord OmokkHighlord Omokk is the first boss in Lower Blackrock Spire, and is a level 59 elite. The boss is joined by two adds.
Opt for using CC on one or both of the adds, then focusing the non-CC'd add then Omokk or focusing Omokk before breaking either CC.
Shadow Hunter Vosh'gajinShadow Hunter Vosh'gajin is a level 59 elite Troll joined by two of the instance's Smolderthorn Shadow Priests.
Try to CC both adds and focus down the boss. If only one CC is available, focus down the other add first then move on to the boss.
War Master VooneWar Master Voone is a level 59 Elite Troll. The boss is located at the end of the long hallway full of trolls, down the large ramp from Vosh'gajin.
The boss has no adds, but hits incredibly hard.
Mor GrayhoofMor Grayhoof can be summoned in Voone's room if someone in the group is on (or has completed) the Tier 0.5 quest, by using the Brazier of Beckoning.
Bannok GrimaxeBannok Grimaxe is a rare spawn who appears in the room before Mother Smolderweb's lair. Bannok is located among other orcs and their tents and may be hard to see at first as he may be seated or sleeping.
The rare spawn may drop the Master Axesmith Plans: Arcanite Reaper.
Mother SmolderwebMother Smolderweb is a level 59 elite spider who lies at the top of the webbed area littered with Spire Spiders and Spire Spiderlings. The boss has two abilities, both of which stun party members.
The Immature Venom Sac dropped from the surrounding spiders can cure the Mother's Milk poison effect, as well as other in-game poisons.
Crystal FangCrystal Fang is a rare spawn that can be found just after Mother Smolderweb. The boss is basically a tank and spank with some interesting loot.
Urok DoomhowlUrok Doomhowl is a summoned boss using Omokk's Head and Roughshod Pike at the Tribute Pile in the room full of ogres after Mother Smolderweb's lair.
Once you start the event, waves of elite ogres will flood the room. Every 30 seconds, you can utilize the Roughshod Pike in the Tribute Pile to kill one of the Ogres immediately. Try to utilize CC as much as possible as well.
Once level 60 elite Urok Doomhowl appears, finish off the other ogres and allow your tank to establish threat on him.
Quartermaster ZigrisQuartermaster Zigris is a boss found after Urok's room in Lower Blackrock Spire.
HalyconHalycon is a giant Worg Boss who is accompanied by Worg Pups.
As soon as Halycon is defeated, prepare for Gizrul the Slavener to run into combat - there is not much time in between encounters.
Gizrul the SlavenerGizrul the Slavener is another Worg boss who will enter into combat shortly after Halycon has been defeated. All group members should eat and drink quickly before Gizrul comes into engagement.
Ghok BashguudGhok Bashguud is a rare Orc who spawns after Halycon's room, accompanied by two 59 elite adds.
Overlord WyrmthalakOverlord Wyrmthalak is the final boss in Lower Blackrock Spire, and is a preview to the type of mobs you will become more and more familiar with as you climb into UBRS and eventually Blackwing Lair.
The boss summons adds at 50% health which can be CC'd.