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Razorscale is the third boss encounter in Ulduar. It is considered an optional boss along with Ignis the Furnace Master, since the raid can proceed right past both onto XT-002. It's also believed to be the product of the plans Loken had for Thorim's mount, Veranus, being a plated Proto-drake.
Razorscal has three phases like air, ground phases and Phase three is a purely ground phase from 50-0%.
When it comes to air, you can begin the encounter, speak to the Expedition. Positioning is the key on this fight. The raid must split into groups so much so that each one can handle the add coming from the mole machines. Other than add damage, the main source of damage is from Razorscale's Devouring Flame, which can be largely avoided by following the "don't stand in fire" basic rule of World of Warcraft. Of all the adds that spawn, Dark Rune Watchers are the most dangerous as well as the raid DPS should immediately focus them down. At least two dedicated interrupters should be spread between the mole machine spawning points, and they should concentrate on interrupting the Watchers' chain lightning ability (not lightning bolt!).
Sentinel is only one add that is more important to kill than the Watchers. Sentinels are random spawns the come only from the center mole machine area but need to be focused down at once. In any given fight, there could be very few of them or many of them. It is unpredictable.
The second Ground phase is in turn. From the time you start the fight, your Dwarven allies will be working to repair the harpoons. The adds that spawn will attempt to attack the Dwarves, so tanks need to be aware and pick them up quickly. As you're fighting adds, you'll receive on-screen messages whenever a Harpoon comes online. Once three of the four are online, a designated DPS raid member needs to move to the harpoons and begins using them. Once all four have been used, the Dwarves will pin her to the ground, during which time your DPS needs to open up completely on her.
It is good to coordinate the last Watcher kill with the use of the final harpoon in that there is only a short window of time during which you can DPS Razorscale before she breaks free. That way DPS is not tied down elsewhere while Razorscale is pinned. When she is about to break free she will use a Flame Breath to destroy the turrets. All raid members need to be behind her so as not to get hit by the breath. As she flies away she will use Wing Buffet, and convert back to phase one.
Now phase three will begin once you have alternated enough Air and Ground phases. You can get her to phase three during your second ground phase if everyone is doing their job correctly and your DPS stays alive. At 50% life, Razorscale becomes permanently grounded and the fight turns into a big DPS race. She will continue to use her normal Flame Breath and Wing Buffet apart from two new abilities.
A Flame Buffet is the first new ability that she will continually apply to the entire raid. It is a stacking debuff that increases the amount of fire damage taken. Any veteran of Blackwing Lair should be quite intimately acquainted with this ability.
Fuse Armor is the second new ability that she'll use it on the tank. This debuff decreases the tanks movement speed, attack speed and armor. Aside from this, she'll still leave patches of flame on the ground, forcing the tanks to drag her around to avoid them, which means that Fuse Armor can make it possible for the tanks to avoid the flame patches with the exception of lowering their threat generation and survivability. To compensate, tanks should swap with each other, alternate using damage reducing and death preventing abilities.
In addition to the hard enrage of ten minutes, the stacking Flame Buffet serves as a soft enrage for the encounter. This is the reason that the third phase is considered a DPS race. Your raid needs to kill her before the buffet stacks so high that her simple abilities become deadly.
Your raid should easily succeed in bringing Razorscale down if only DPS is on task and does not get killed by avoidable damage.
Razorscal has three phases like air, ground phases and Phase three is a purely ground phase from 50-0%.
When it comes to air, you can begin the encounter, speak to the Expedition. Positioning is the key on this fight. The raid must split into groups so much so that each one can handle the add coming from the mole machines. Other than add damage, the main source of damage is from Razorscale's Devouring Flame, which can be largely avoided by following the "don't stand in fire" basic rule of World of Warcraft. Of all the adds that spawn, Dark Rune Watchers are the most dangerous as well as the raid DPS should immediately focus them down. At least two dedicated interrupters should be spread between the mole machine spawning points, and they should concentrate on interrupting the Watchers' chain lightning ability (not lightning bolt!).
Sentinel is only one add that is more important to kill than the Watchers. Sentinels are random spawns the come only from the center mole machine area but need to be focused down at once. In any given fight, there could be very few of them or many of them. It is unpredictable.
The second Ground phase is in turn. From the time you start the fight, your Dwarven allies will be working to repair the harpoons. The adds that spawn will attempt to attack the Dwarves, so tanks need to be aware and pick them up quickly. As you're fighting adds, you'll receive on-screen messages whenever a Harpoon comes online. Once three of the four are online, a designated DPS raid member needs to move to the harpoons and begins using them. Once all four have been used, the Dwarves will pin her to the ground, during which time your DPS needs to open up completely on her.
It is good to coordinate the last Watcher kill with the use of the final harpoon in that there is only a short window of time during which you can DPS Razorscale before she breaks free. That way DPS is not tied down elsewhere while Razorscale is pinned. When she is about to break free she will use a Flame Breath to destroy the turrets. All raid members need to be behind her so as not to get hit by the breath. As she flies away she will use Wing Buffet, and convert back to phase one.
Now phase three will begin once you have alternated enough Air and Ground phases. You can get her to phase three during your second ground phase if everyone is doing their job correctly and your DPS stays alive. At 50% life, Razorscale becomes permanently grounded and the fight turns into a big DPS race. She will continue to use her normal Flame Breath and Wing Buffet apart from two new abilities.
A Flame Buffet is the first new ability that she will continually apply to the entire raid. It is a stacking debuff that increases the amount of fire damage taken. Any veteran of Blackwing Lair should be quite intimately acquainted with this ability.
Fuse Armor is the second new ability that she'll use it on the tank. This debuff decreases the tanks movement speed, attack speed and armor. Aside from this, she'll still leave patches of flame on the ground, forcing the tanks to drag her around to avoid them, which means that Fuse Armor can make it possible for the tanks to avoid the flame patches with the exception of lowering their threat generation and survivability. To compensate, tanks should swap with each other, alternate using damage reducing and death preventing abilities.
In addition to the hard enrage of ten minutes, the stacking Flame Buffet serves as a soft enrage for the encounter. This is the reason that the third phase is considered a DPS race. Your raid needs to kill her before the buffet stacks so high that her simple abilities become deadly.
Your raid should easily succeed in bringing Razorscale down if only DPS is on task and does not get killed by avoidable damage.
