· An Artifact Chest. Each Artifact Chest contains one mysterious artifact. Participants with at least five valid invitations will be eligible to mint one Artifact Chest. Artifact Chest is an SBT which means you cannot list or transfer it. There were five different artifact chests. The rarity of the chests will be determined by the number of valid invites you have. The rarer the artifact chest, the mightier artifact you will get.