Moving out from Aran's room, head west and up through the hallways. You are able to go fight either Netherspite or head toward the Chess Event area, which we will cover later on during the week. For now, clear the last few of the ghostly apparitions and Ethereals, and you will be arriving at the Celestial Watch. Here's one of Karazhan's optional bosses, Netherspite the Dragon. It is recommended you fight him since he has some great gear your raid could benefit from.
So what does Netherspite do
Melee damage - normal 3-4k damage on tank, without his buffs.
Nether Burn: 1200 shadow damage every 5 seconds aura - can be mitigated by Shadow Resist
Void Zone Consumption: 1000 shadow damage every 2 seconds to everyone in the void zone, stay out of it!
Empowerment: +200% damage buff, not dispellable
Enrage: 9 minutes in, Netherspite increases his damage and spams nether burn every second, it's a guaranteed wipe shortly after.
There are two phases to this fight - portal phase and banish phase.
This is the phase that starts the fight, Netherspite will open 3 portals across the room, one north, one east and one west. They will emit one beam of their color each, targettng Netherspite. Your goal is to have a player take these beams and rotate out within 24 stacks or so of said beam. Let's analyze what the beams do.
Should it hit Netherspite, it reduces his damage taken.
Once it hits a player, that player becomes Netherspite's #1 and only aggro - ideally tanks grab it. This beam will extend your HP by 31,000, and each tick will lower that amount by 1000. Once you have stacked enough, swap out for another tank.
Should it hit Netherspite, heals him for 4000 per tick, stacking up the heals. If this beam hits Netherspite, consider resetting the encounter.
Once it hits a player, it will increase their healing done by 5% per tick, and spell cost reduced by 1%, however, you will lose 200 maximum mana as well, per tick. Avoid this by stepping out early, or just having a rogue or melee absorb it as healing isn't that needed in boosted form this fight.
Should it hit Netherspite, it increases his damage by 1% per tick.
Should it hit a player, damage dealt is increased by 5% per tick, but healing reduced by 1%. Damage taken by spells (including the aura!) will be increased by 8% per tick. This is especially important since if you have over 25 stacks on you you will receive a lot of damage from his aura, so watch out!
Once a player steps out, he will receive a debuff called Nether Exhaustion, preventing them from receiving the ray again for a little while, so assign 4 people to each beam, ideally.
~30 second phase, all beams disappear. Your raid must spread out (be in range of healers!) and Netherspite will have no set target, as well as not move. He will randomly fire off Nether Breaths hitting 4 people or so in the raid, and knocking the victims across the room. You may still DPS netherspite in this phase, but if you get close you will be meleed by him.
After this phase, he will return to his normal phase for a few moments while he reopens the portals. During this timeframe, he will use his normal aggro list, so make sure your big DPS is weary of this while the red beam is picked up again.
After you have burned him down, it's time to check what this big bad dragon has!
Mail - Chest
Equip: Increases healing done by spells and effects by up to 86.
Equip: Restores 11 mana per 5 sec.
Girdle of Truth
Plate - Waist
Equip: Increases healing done by spells and effects by up to 66.
Equip: Restores 8 mana per 5 sec.
Jewel of Infinite Possibilities
Held In Off Hand
Equip: Improves spell hit rating by 21.
Equip: Increases damage and healing done by magical spells and effects by up to 23.
Cowl of Defiance
Leather - Head
Equip: Improves hit rating by 24.
Equip: Increases attack power by 100.
Mail - Legs
Socket Bonus: +6 Stamina
Equip: Improves critical strike rating by 28.
Equip: Increases attack power by 56.
Equip: Restores 8 mana per 5 sec.
Pantaloons of Repentence
Cloth - Legs
Socket Bonus: +4 Spirit
Equip: Increases healing done by spells and effects by up to 68.
Mantle of Abrahmis
Plate - Shoulder
Socket Bonus: +3 Dodge Rating
Equip: Increases defense rating by 23.
Mithril Band of the Unscarred
Equip: Improves critical strike rating by 22.
Leather - Legs
Socket Bonus: +4 Dodge Rating
Equip: Increases your hit rating by 28.
Equip: Increases attack power by 64.
Cloth - Head
Equip: Improves spell hit rating by 19.
Equip: Improves spell critical strike rating by 25.
Equip: Increases damage and healing done by magical spells and effects by up to 46.
Binds when picked up
Sword - One-Hand
165 - 308 Damage
(87.6 damage per second)
Equip: Increases attack power by 46.
Shining Chain of the Afterworld
Equip: Increases healing done by spells and effects by up to 46.