Greenmist was indeed in before Luclin. It ,however never became available to other races until after Luclin. Those of you who wanted the greenmist better roll iksar =)
http://web.archive.org/web/200204090...html?item=7029
^ Date before luclin
http://www.championsofcabilis.com/khukri8.html
^^ Date after luclin. July 2002 , As you can see it is still iksar only.