The Frosthaven Crystal was a unique mineral from Frost City, and it had already become spiritually mature. It was an excellent material for crafting artifacts for immortals.

Unfortunately, such minerals no longer existed, as Adrian had absorbed all the aura essence. Only a small amount remained, but it still held considerable value.

All transactions involving exchanged spiritual treasures had to be registered. Therefore, the apprentices in charge of the warehouse couldn't embezzle any of them