Since everyone is emphasizing on unique token address, now to be crystal clear:

Let's say i have issued 100 Gaming different swords  each with unique attributes such as (attack value, power etc...)  in this case every item will have its own unique address, now based on the repliers feedbacks the solutions seems to be as follows:

After creating swords (NFT) tokens  the addresses of all created tokens should be saved in a database on the server, and then when the players tries to bring a sword into the game the system should check it the token's address is one of those addresses stored in the database.