Heritage levels
From ThresholdRPG Wiki
Prior to joining a guild, you must first complete your 10 Heritage Levels. The Heritage Training Areas are located north of the adventurers guild in Sable, or in the Thracian Adventurers Guild.
In training Heritage Levels, Adventurers increase their basic and necessary skills and increase their hit points, spell points and endurance points. Your stats, along with your player levels, guild levels, skill Levels and spell levels will determine how effective you are in both combat and interaction with Non-Player Characters.
While completing your Heritage Levels, you are becoming familiar with the overall layout of the Realm, the basic command structure, and most importantly, you become acquainted with other adventurers.