The most unique class you have ever played

So every one here have played different MMOs and RPGs and other similar games to this day. All these games have different classes and races and and these games also has some unique features.
My question to you guys is
what is the most unique feature/class/race be it anything you have seen experienced in the game you have played?

To me it would be playing as a Druid in World of warcraft. That class has the most unique ability to transform into a bear a cat a big chicken or into even a walking tree.

I started this thread because i am bored now

I would have to agree with the Druid in WoW, but then again WoW is the only MMO I have played so I really don't have much to compare to. Druid's are definitely multifaceted and can do pretty amazing things in pretty much any form, Feral DPS being the weakest. They are very strong healers, tanks, and caster dps.