The guild was tweaked a little, I'll try to list everything I remember here:
-You got a new skill 'kiss of death'
-You got a new spell 'Aura of Chaos'
-You got a new spell 'Acid rain'
-You got a new spell 'Chaos bolt'
-You got a new 'mastery' which grows when you cast spells and use skills; the
masteries can be seen by the command 'lord_chaos masteries' -- though they're
currently only visible when you've got the first percent.
-The life experience of your blade counts for more than it used to.
-The masteries have an effect on your skills/spells; some are easily
distinguishable, some are not.
-That's it for now, I guess, I hope I didn't miss anything crucial; effective
immediately.

-j