@Yirrare As far as I know there are no prerequists for any of the abilities. So a new player picks a class, for this example Constitution, then player picks from one of the four trees in the class, example be damage reduction, then picks one out of the twenty five powers, example thick skin (note I am randomly guessing trees and powers).
If I remember correctly every level you gain like two points in your choosen attribute and lose eiher one or two points in an opposing attribute. For the constitution example I believe it is dex that is dropped.
Also Con and Str boost the Fort save. Wis and Int boost Will save. Cha may also boost Will save or have its own Social save and Ref is boosted by Dex. Oh and since combat is heavily linked to gaining exp the value is determined by the threat. So a goblin in a Paladin Tank is given an exp value higher then a normal goblin, which is fine but when you have powers in Intelligence and Wisdon capable to nuking said goblin easily (like magic in D&D) the player gets higher exp by way of threat.
Before I forget, and it may have changed, it somewhat follows 4th edition by way of one gets at will powers, per encounter powers and a daily power. I believe you can also get more then one daily power at higher levels. Level cap when I last talked with them was 6.
