The preserver is a wizard who seeks to maintain the environment while drawing magical power from it. In the give and take of spell casting, preservers have mastered the balance. A preservers magical spells are cast in harmony with nature, and there is no damage to the sur rounding environment.
A preserver who has an Intelligence score of 16 or higher gains a 10% bonus to the experience points he earns. He follows all other rules presented in the Players Handbook and advances in level as noted on Table 20: Wizard Experience Levels in that book.