@PetitPangolin, thank you for creating this thread. Some in my guild have been suspecting cheating/hacking in Cyrodiil, and this...
... has killed me on a couple of occations on the NA Wabbajack campaign. It was the same nightblade player who did it. Everytime I would get in melee range to dark talong him *boom*. All 3000 HP lost even while blocking.
Since the death recap, I've been waiting for it to happen again so that I can screen shot it.
Until now I had no explanation to what was causing the insta-death other than it was nightblade characters. Now I at least have a plausible explanation. Thank you.