What mechanism ensures the uniqueness of items obtained through drops in crypto games?

The uniqueness of items obtained through drops in crypto games is ensured through the use of blockchain technology. Each item is represented as a unique digital asset on the blockchain, with its own distinct identifier and ownership record. This ensures that no two items are exactly the same, and that each item can be traced back to its original owner. Additionally, the decentralized nature of blockchain technology prevents items from being duplicated or counterfeited, further ensuring their uniqueness.