A terrible evil squats in the heart of this cavern, <name>. Forgemaster Pyrendius has personally crafted many of the cursed weapons that Twilight's Hammer is using in their conquest of the realms above.
Before we can leave these lands of flame... Pyrendius must die.
He will not go down easy. But if I'm reading the tome correctly, we can briefly open up small gateways to the Abyssal Maw, the realm of water. Lure Pyrendius onto a portal rune and activate it to weaken him!
Is Pyrendius dead? This ashen heat of this cave is suffocating me!
Completion
It is done! We'll seal this firey hole up behind us and let the minions of the Twilight's Hammer discover the corpses we left behind. We couldn't have done it without you, <name>!
Notes
Head southeast past the portal master. Pyrendius, a level 81 elite flamewaker with 185,000 health is at [31.9, 46.3]
in the center of the southeast room. Circling him are five portal runes, much like the runes seen in Molten Core. Trigger a rune then drag Pyrendius over it to knock a healthy chunk of his health off.
On aggro:
Forgemaster Pyrenius says: Impurity! Your fragile flesh defiles my work.
On getting hit by water from the Abyssal Maw:
Forgemaster Pyrendius howls in fury as he is doused by water!
Then one of...
Forgemaster Pyrenius says: Water! Here!?
Forgemaster Pyrendius says: I'll get you, mortal! And your little wolves too!
Forgemaster Pyrendius says: Aiiieee!
Forgemaster Pyrendius says: It ... burns!
Forgemaster Pyrendius says: This <glub> is not over yet, mortal...