Supposedly to be added at a much later date, in fact the last of the 7waves update, Sword Master Lyn (or Blademaster) has been bumped up to the 3rd wave, with the release date being 7th November, which is exactly 2 days from now.
It seems that the developer intended to give everyone a surprise, and apparently some of the gamers are raging about this sudden announcement. Nevertheless, this new class will probably be everywhere come this Wednesday.