Level

There are two kinds of levels: Concentration Levels and Regular Levels. You gain Concentration levels by successfully using skills. Regular Levels are gained by defeating enemies, and thereby gaining experience. As your (Concentration) level increases, you will become more powerful:

Concentration 

1. You will get an extra 10 mana to use skills with.

Regular Levels

1. You will get one attribute point.
2. You will gain more health.