Seasonal Sales are limited-time sales that align to a new ‘season’ of Gods Unchained. Seasons introduce new expansion sets, such as Trial of the Gods, which tend to have a finite amount of items for direct purchase. During this time, players can purchase first edition expansion card packs directly from the Gods Unchained website. These are available until the sale ends or the number of items available runs out.
A portion of seasonal card packs is always reserved for rewards and giveaways so they can be won by players after the season has ended (as has happened in Weekend Ranked tournaments) but this allocation also has a finite amount.