Tukaarak the Warder shouts,' Warders, I have fallen. Prepare yourselves, these fools are determined to unleash doom!
Source:
https://www.youtube.com/watch?v=iBKHst-Xf6E
Tukaarak the Warder's corpse says 'NO! The Sleeper stirs! Beware, you will unleash DOOM!'
2nd death message, dunno which one is true. I think the Prepare yourselves speech is classic.
Source:
https://www.youtube.com/watch?v=dG-hrGGoMPc