They also include cards from previous sets and are intended to be fully playable decks.
In addition to starters and boosters, there is also the occasional "learn to play" set containing two fixed decks and an expanded rulebook for new players and a fixed "direct to player" set unavailable except directly from AEG.
The rarity symbols are circle for common, diamond for uncommon, star for rare, triangle for promo, hollow diamond for "premium" (bonus cards found in Emperor Edition and later boosters), and star within a circle for fixed cards.
This allowed tournament rules to limit the card base allowed to be used: either "Strict Jade" in which only cards with the bug were legal or "Extended Jade" in which all Actions, Followers, Items, Kihos, and Regions were legal but all other types were required to have the bug.
All sets in this arc included random foil versions of rare cards.