The other day, we spent about 8 hours camping Verix Kylox Remains only to never see him spawn. Mind you this was with 6 minute spawns....
I also asked around to the many people testing Karnors, and nobody had admited to seeing him spawn yet.
He was a rare spawn, but no way in hell was he this rare. Can you check to see if he is spawning at all?
His Placeholder is "Decayed Kylong Iksar".
On live I remember him spawning about every 1 in 4 or 5. So around 20-25% chance. Although on Allahk, they say he had around a 10% chance of spawning.
http://eqbeastiary.allakhazam.com/search.shtml?id=6367