In this realm, adventurers are not restricted by what they can pursue as a profession in any way - there are hundreds of combinations of abilities that can be mastered, and everyone has the opportunity to learn them all.

When a new citizen of Thera takes to the land, he or she finds him- or herself in the Guild of Adventurers - the default first guild, containing only the most basic of skills and designed to help launch them into the world. The Guildhall of one's respective racial city is generally the first place they really notice, and contains much useful information about other Guilds and the world. After one has finished training with the Guild, they are given the option of joining other Guilds, as follows:

No two Guilds are the same, and every Guild has its own specialties, requirements, and needs. To join any given Guild, you must master (master approximately 80% of the abilities therein) one or two lower-classed Guilds as it demands. The only exceptions to this are the Adventurer's Guild, which is default, and the tier 1 Guilds (Wizardry, Thievery, Healing, Combat, Shadows, Nature, Craftsman and Merchant), which require only Adventurer.

In that Guilds work in a hierarchical pattern, you can learn as many or as few as you wish - you can also choose how in-depth you wish to study each major type of knowledge, be it magical, combative, etc. If, for example, you join every tier 1 Guild, you can learn the contents of each and be an extremely well-rounded person, but would find it difficult to specialize in the higher ranks of any of them, as you must earn practice and training points through experience (gained through using skills, plying trades such as farming and mining, and exploring), and can only feasibly earn so many. Few manage to master all tier 2 Guilds, let alone all tier 3s, so the degree of specialization is up to each individual. One could become a Journeyman class of every major institution, or could resolutely follow the trail of Wizardry to become an Adept of the Battlemage Guild - the options are wide open.