The other day in WSG, a Rogue was "Immune" to my Chaos Bolt. This was quite confusing for a few reasons:
1.) I'm fairly certain he did not use CloS, and even if he did it should have registered as a miss rather than an immunity, and
2.) I recall reading somewhere that Chaos Bolt pierces the effects of CloS as it is.
Can anyone shed some light on this? If it helps he was at least 51 pts into combat as I was Killing Spree'd shortly after he was immune to my 51 point talent spell.