Set specific booster packs include six cards, at least one of which is a Heroic or higher.
Legendary Chests include ten cards, with at least one Legendary and at least three cards of Heroic rarity or higher.
You can find cards of every rarity in any pack. The different rarities in SolForge are Common, Rare, Heroic, and Legendary.
Posted in: Earning & Collecting Cards