Each time you level you will gain skills points. These skill points are used to upgrade the various skills in the game. The number of skill points you gain each level increase as you grow higher. Once you turn master you gain enough skill points to max every vagrant, first class, and second class skill. Vagrant skills cost 1 skill point each level, first class costs 2 skill points each level, second class costs 3 skill points each level, and third class costs 4 points each level.