Ras Frostwhisper was one of the original bosses of Scholomance prior to Mists of Pandaria.
It's a real shame that he didn't make the cut. The lich was an interesting boss fight and I loved his emotes. Also, The Laboratory (his room) was one of the few places in the game where an Alchemist could find an alchemy lab. Alchemy labs - until Patch 3.0.8 - were necessary in the creation of several potent flasks.