The game introduces a few innovations, such as a random talents
system for the various classes, attributes-based saving throws, Gift
score for re-rolls and multiclassing, a special melee roll that resolves
attack and defense with a single roll, special rolls for Turns-based
exploration and encounters, Hirelings, etc.
Sorcery and clerical blessings do not require to memorize spells
but use a simple count to determine how many can be cast per day.
The leveling up system is simple and all classes need the same
amount of XP per level. Sorcerers and Clerics, though, need to pay XP
to improve their power-matrix and to acquire new spells.