Well, here we are, the first two of the final four bosses of the expansion. That is, we think Deathwing is the final boss of the expansion -- it is still unclear whether Blizzard will pull another We're not done with the next expansion yet! raid on us like it did in Wrath with Ruby Sanctum. Regardless, we have a raid that needs a conclusion and a guide to go along with it, so let's get started!
Please note that this guide, like many others I have written, is for the normal version of each encounter. Some mechanics, like Fading Light and Twilight Sappers, either work differently or have been removed on the Raid Finder difficulty.
I really wish I had more to say about this fight, but Blizzard isn't having it. Simply put, Ultraxion is this raid's Patchwerk with the addition of a button. Yes, you really do just stand in one place, run your rotation train on him, and hit a button when the situation calls for it. I honestly wish there were more to this fight, but there it is.