Faster Than the Speed of Light

Score one for me. Edit: Why am I being downrated, I spent my entire life on this stuff, and the one time I gloat I get crucified for it?

When an object speeds up, it gains mass.
That extra mass requires extra energy to speed up.
By the time the object reaches the speed of light its mass will be infinite and thus require an infinite amount of energy to to increase its speed.
Since nothing can be bigger then infinity, nothing can travel faster then the speed of light.

This event starts the moment Brann opens the door, giving you 5 minutes to kill all 4 of the Elemental Warders and opening the far door. The initial role-play will take off 10 seconds from the timer, so you need to move quickly and drag the Trogg groups with you as you engage the various lieutenants. Each of these Trogg packs will respawn very quickly (think of the flame room in BRD). A good group can avoid all but 4 packs of Troggs (the ones on the stairs).

Of the 4 Elemental Warders, only the Fire Warder is particularly dangerous. When he channels Raging Inferno ([spell=77241]), the group needs to move away from him as it will quickly kill even the hardiest of tanks in a few seconds. He also randomly casts Lava Eruption ([spell=91161]) on the floor which deals 40k+ damage. The Lava Eruption can be avoided by watching for the small lava pool on the ground.

If you can kill the 4th lieutenant with ~20 seconds remaining on the achievement timer, then this achievement will auto complete at the conclusion of the small role-play event when the doors opens. It is not necessary to kill Anraphet in the time alotted (~4:30), so you do not have to pull him immediately, giving your group time to regain their mana and rebuff if needed.