How does the rarity of an NFT work? 

How do rarities work? 

Answer: The rarity of a token depends on the class - Common, Rare, Epic, Legendary or Apex - as well as the stats are connected to the token. There can be as many as 30,000 of the same type of common NFT.  Fewer will be available as the rarity of a token increases. For example, Apex NFTs are one of a kind.

The rarer the token is, the more valuable as a collector's item it is in the marketplace for trading.