Prestige classes were introduced in third edition as a further means of individualizing a character. They expand upon the form of multiclassing and are inaccessible at 1st level, specifically meant to be multiclassed into from the base classes. To attain a specific prestige class, a character must first meet a number of prerequisites, such as certain feats or membership in a specific organization. Prestige classes offer a focus on different abilities that may be difficult to attain otherwise; for example, the 3rd edition version of the Assassin prestige class grants minor magical powers, more sneak attack damage, and better usage of poison.