Level

A character's Level is a reference to their general level of power and ability to use Mana and System abilities. Level is associated with a character's Class. Characters without a Class can accumulate XP, but cannot level or gain Class Skills. (The XP is awarded all at once, retroactively, when they choose a Class.) When a character levels, they are awarded a free Attribute Point, and every five levels they are awarded a free Class Skill slot (including two at Level One.)

Leveling works on a roughly double-up basis: that is, every level takes roughly twice the number of XP that the one before it did. Since this is an exponential growth factor, leveling seems likely to slow down greatly as a character advances in level. Comments by beings more familiar with the System late in the book Mind Games appear to bear this out.

Class Skills and General Skills (and, presumably, Special Skills and Spells) can also be "leveled" by use, although it is not clear if this is related to overall Class level.