After earning a new level the player will get a specified amount of credits to spend on statistics and skills. Statistics include Strength, Life, and Mana. Statistics only cost one credit per increment. The increment is different depending on the statistic. Skills include Spells, Auras, Combat skills, and passive skills.
Skills usually cost multiple credits, depending on the skill and the skill level.
The more strength a player has, the more damage they'll do. Strength is also required to use certain weapons and open certain doors. Strength is the most important thing to get when creating a combative weapons based player. The more health a player has, the more damage they can take. Health is the second most important thing to get when creating a combative weapons based player.