Confirming spawns as the 3 roaming 'a drachnid knight' mobs. have never killed the static two so don't know about them.
Has approx 950K HPs.
Doesn't cast it's spell very often (at 5s for me then was dead at 42 s without casting it again).
Max hit on me (92SK) was 10683, most hits were 5k or less however.
4 Kills and not one sword drop, bloodmagic emblem every time.
Edited, Oct 12th 2012 12:26pm by Umbraeques