You. Will. Die.

 pits you against perhaps the most difficult enemy in the game thus far, Crawmerax the Invincible.

Objectives
Find Crawmerax. Kill him... if you can.
 * Kill Crawmerax: 0/1


 * "There is an ancient tale in these parts of a massive beast that used to roam the sea. This is way back when there was water and everything. The tales have been passed down from generation to generation. His name was Crawmerax. They said he was invincible. Why am I telling you all of this? Since you blew up that Lance depot there have been tremors in the Deep Fathoms. Some say that Crawmerax is out there. That you reawakened him from hibernation. It would be one hell of a story if it were true, and whoever killed him would become a legend!"

Completion

 * "Holy crap. You did it? For real? I was just making up a story. I didn't think he was really out there."

Trivia

 * This mission may be a reference to the Mortal Kombat movie when Shang Tsung says, "You! Will! Die!".


 * This mission could also be a World of Warcraft reference. The final boss C'thun in the Temple of Ahn'Qiraj - an old 40-man raid instance - will occasionally whisper players any number of creepy things including "You. Will. Die." This may be further supported by the fact that C'thun is a giant insectoid demigod, similar to Crawmerax.


 * It might be a reference to the evil emperor speaking to Luke in Star Wars. After he chops Darth Vaders arm off and the emperor is hitting him with the force lightning, the emperor says "Now, young Skywalker, you...will...die!"
 * Alternatively, it may not be an intentional reference at all; rather simply a comment on the fact that the mission is indended to be the most difficult in the game.