Throne of Thunder Part 3: Halls of Flesh-Shaping
This wing of the Throne of Thunder tore at my heart. A thrown away disobedient pet, a flawed experiment tossed aside for a more perfect creation, and a giant blob of....what exactly was that stuff? Often, after running through a raid again and again, I forget what it is that is in the flavor dialogue and text. Primordius' screams of agony rip through me every time I'm there. So much pain. This wing paints such a vile picture of the Thunder King, in his desperate grasp for absolute power was willing to cross any barrier of morality or possibility to be the penultimate ruler.
Stories beside, I can say with confidence that of the four wings in the ToT, the Halls of Flesh-Shaping was my favorite.