Hraashna the Warder
Slay message:Hraashna the Warder says "Ten thousand years of rest here, it feels good to crunch bones and rend flesh again. I'm almost glad you came, if the stakes were not so high"
Death message: Hraashna the Warder says "Veeshan, forgive me, I have failed you and all our kind!"
Source:
https://www.youtube.com/watch?v=RgVkVZybtFQ
Tukaarak the Warder
Slay message: Tukaarak the Warder says "I must finish you all off quickly and resume my concentration"
Source:
https://www.youtube.com/watch?v=69ZaHRqRcwg