Nightbane is a summoned raid boss in Karazhan. Once named Arcanagos and formerly part of the Blue Dragonflight was transformed by Medivh into a fiery skeletal dragon.
Once summoned, Nightbane will fly down from the sky initiating his ground phase and the start of the fight. The tank should quickly pick it up and place their back against the outer wall. Fear wards and Tremor Totems should be used during the entirety of the fight to help the tank and melee against Bellowing Roar. Melee should be positioned at the rear leg like any normal dragon fight. Healers and ranged DPS should be max distance to avoid fear completely.
During this phase Heals and ranges groups should be split. 1 against the Dome and the other against the outer wall. This will help stagger the placement of Charred Earth and if placed correctly a healer will always be stationary to heal. Ideally you will stay along the wall and move forward. This might put you within range of fear but shamans should have Tremor Totem placed at all times. An exception would be if there is a possibility of getting cleaved, then you would simply group with the others on the inner side.
After Nightbane is reduced to 75%, 50%, and 25% respectively; he will take off and his Air Phase will begin. Upon flight, everyone should collapse and hunters should drop frost traps. He will then target a random player or pet and cast Rain of Bones. After the skeletons have spawned everyone can then spread back out. At this point everyone should focus on the skeletons to bring them down as quick as possible. His next ability is extremely dangerous and if healers are not ready could easily kill someone. Smoking Blast will target the highest player on the threat table.
There are 2 ways to deal with this troublesome ability. One way for Warrior Tanks to sit with the rest of his group and spam Commanding Shout. The threat generated from this should be enough to be the focus of Smoking Blast. The second and newest way, is to have the Hunter feed their pet Kibler's Bits. Simply feeding their pet with this food generates monstrous threat on Nightbane and he will then focus the Hunter, NOT the pet. The target must be healed immediately and dispelled each time they are hit! Air Phase finished after both Rain of Bones and Smoking Blast is used.
Before the transition to Ground Phase everyone should be back in their original positions and any extra skeletons, that are not yet dead, should be pulled along. The tank needs to quickly reestablish aggro. Misdirection will help immensely here.
Now rinse and repeat at 50% and 25% health. Collect loot and congrats on fully clearing Karazhan!
Face Nightbane to outer wall
Build threat quick after Air Phase
Move from Charred Earth
Melee focus skeletons on Air Phase
Casters focus Nightbane on Air Phase
Watch threat during phase transitions
Ranged stay max range
Move from Charred Earth
Dispel Distracting Ash and Smoking Blast DoT
Dont cancel heals on Smoking Blast target
Stand max range