Click "World" at the bottom of the screen to go to the World map.
Starting from Region 1 - Stage 1, when there are less than three NFT Fighters in the team (hereinafter referred to as "non-NFT team", otherwise referred to as "NFT team"), there is a chance to obtain low-star hero advanced materials after victory. On this basis, the NFT team will have a chance to obtain ascend materials for high-star Fighters after stage clearance.
Starting from Region 4, after completing all the Stages of each Region, regardless of whether the NFT team or not, the serum can be obtained when collecting the treasure box.
At the same time, starting from the first level of Chapter 4, the NFT team has a chance to obtain serum and zombies after victory.