According to Cointelegraph, Web3 game Gods Unchained has introduced a new gameplay format called 'Sealed Mode,' which allows players to compete using semi-random cards received at the start of a tournament. This format aims to reward highly skilled players, even if they do not have a large or expensive card collection. Sealed deck tournaments are common in paper collectible trading card games such as Magic: The Gathering but are relatively rare in digital trading card games.

To participate in sealed mode, players must pay an entry fee of 15 Gods Unchained ($GODS) tokens, worth approximately $2.65 at the time of publication. They then receive a random selection of three gods to build a deck around and 60 random cards drawn from multiple Gods Unchained card sets. The pool of cards is semi-random but contains a minimum number of specific card types to ensure a viable deck can be built.

Players must build a minimum 30-card deck from their pool of 60 cards and cannot use cards from their personal collection. After building a deck, players compete until they either lose three matches or win seven. Players with better records at the end of the tournament receive more rewards than those with worse records. Some cosmetic rewards are only available in sealed mode and can be obtained by players who win four matches or more. In Gods Unchained, each card is represented by a nonfungible token stored on the Immutable X network, a layer-2 of Ethereum.