There are 15 skills, each of which has a unique combination of two stats that it rewards. Level up skills by gaining XP by doing certain actions depending on the skill. All skills are easily viewable in GUI inventory menus, accessible using /skills.
There are 6 stats that buff the player:
Mana Abilities are a special type of ability that costs mana to use and are active, meaning they require the player to activate or use. By default, mana abilities are unlocked at level 7 of that skill and increase in level every 7 levels. Level increases can change duration/power, cooldown, and mana cost,