Some ideas of MMORPG come into my mind lately. And they were drawn down on the paper, cuz i'm not good at explanation.

Swordman is the advance class of fighter. (one of classes which you can choose when you create your char.) Unlike other fighter advance classes. swordman junction their soul with the mana of nature, combine them with physical strength, and use it to aid their allies in combat.

Most skill of him are buff and de-buff, but the swordman still have some attacking skills. He can be everything in party. A tanker, a supporter, even a scout.