Ashengate

Overview

The final zone of the fire half of the expansion, Ashengate is split into three wings. The east path populated by drakkin and griffons, the west path by animated statues, drakes, and ooze, and the north wing which leads to the great scale of Veeshan herself. The zone is designed for those already 75 and hosts 15 loot dropping rares as well as 3 zonewide rare drops:

Rare Mobs

Advisor Neezin D`rahl
PH is "a Scarlet Legion advisor" at the gate. Hits for 2200 at least, casts Shadowknight spells. No other data. Always drops Fourth Fragment of the Kings' Disk for The Disk of Kings quest and the Key of Flame to unlock the gate leading to the back of east wing.
Drops - Polished Krithgor Bone Ring, Tainted Darksteel Battleaxe
Arbitor of Ash
PH should be "an arbitor of ash". No fight data.
Drops - Black Legion Marker, Weighty Jagged Einhander
Argil Oppressor
PH should be "an argil oppressor". Hits for 2200 with single target rampage. No data on spells.
Drops - Crest of the Scarlet Legions, Magmamail Collar
Attendant Jin`zhu
Multiple eggtenders act as PH. No fight data. Always drops First Fragment of the Kings' Disk for The Disk of Kings quest.
Drops - Splintering Spinestone Wand, Scaleguard Spaulders
Brimstone Juggernaut
PH should be "a brimstone juggernaut". Hits up to 2400 and casts Shadowknight spells.
Drops - Amulet of the Scarlet Legion, Magmaraug's Burning Essence
Captain of the Guard
PH is "a Scarlet Legion captain". Hits for up to 2900, can AE rampage, and casts Shadowknight spells. Always drops Second Fragment of the Kings' Disk for The Disk of Kings quest.
Drops - Soldier's Stone of Purity, Crystalwing Stud of the Fallen
Core Flame
No fight data.
Drops - Barbed Dragon Bones, Spiritwhisper Cloak
Galvanized Guardian
PHs are the "a galvanized guardian". Hits for 2500, can AE rampage, and casts Shadowknight spells.
Drops - Clergyman's Stone of Purity, Mask of the Black Legion Scouts
Griffon Trainer Ahrendes
PH is "a Griffon Trainer". Hits for 2500 and can flurry. Always drops Fifth Fragment of the Kings' Disk for The Disk of Kings quest.
Drops - Girdle of the Magma Priest, Faceless Guise of the Reliquary
Laila the Forgotten
PH is "a Elddar spirit". Can hit for just over 3000, no info on spells.
Drops - Stone of Dragon Scales, Band of the Scholars
Magmaraug
PH is a goo. Hits just shy of 3000 and can flurry. Always drops Core of the Tyrant for Charm of Lore.
Drops - Lava-Drenched Gnoll Heart, Mantle of Hanging Flesh
Quartermaster Ilzjinn
PH is "a Scarlet Legion quartermaster". No fight data. Always drops Third Fragment of the Kings' Disk for The Disk of Kings quest.
Drops - Eggshell Fragment, Umbracite Spiked Shoulderguards
Scale Guardian Oriam
PH is "a Scarlet Legion scalewatcher". No fight data. Always drops Sixth Fragment of the Kings' Disk for The Disk of Kings quest.
Drops - Pyrewood Earring, Spellstring, the Bard's Muse
Snapper
PH is a roaming drake. No fight data.
Drops - Black Legion Templar Band, Thrice-Banded Warclub
The Unspeakable
PHs are multiple "a pile of ashen ooze". No fight data.
Drops - Purified Lava Vein, Ro-Touched Ear Stud

Quests and Missions

Key of Flame

Quest giver: none
Requirements: none
Reward: Access to back of east

Not technically a quest. In the deep end of the East Wing camp Advisor Neezin D`rahl. She drops Key of Flame. With this you can use levitation to float from the ledge in the North Wing over the lava to the northeast and open the gate. This allows Much faster access to the area and can make questing that region significantly easier. It does not go on keyring, so you get to carry it around.


Y`ssuria's Arc

Quest giver: Y`ssuria the Elder
Requirements: none
Reward: Infiltrators and Traitors of Ashengate faction and Cloak of the Elder Drake

Y`ssuria is in Crescent Reach (375, -905), but as I don't have a page for Crescent Reach on the guide I'm putting her tasks here. The arc consists of 3 tasks:

The Sanctity of the Scale
The first task is simple, just go to Ashengate up the north path and stand at the tip of the precipice to trigger a location update. Then return to Y`ssuria for +150 to Infiltrators and Traitors of Ashengate.
The Agony of Uncertainty
For the second task you'll need to purchase a "Blank Canvas" and "Set of Sketching Tools" from Merchant Jhenner (about 640p together) in Crescent Reach. Go back to the same location and click the Tools to "sketch" the scale. This takes 60 seconds. If you are right at the tip of the ledge you can do this without agro'ing the guards. When it finishes you get a "Sketch of the Reliquary", just take it back to Y`ssuria for +150 to Infiltrators and Traitors of Ashengate.
The Ecstasy of Relief
The third task is the same as the second, except you need the "High Quality Sketching Tools" which costs about 500p more and takes 3 minutes to cast. Return the finished sketch for +150 to Infiltrators and Traitors of Ashengate and the Cloak of the Elder Drake.