At the moment Feng Xue received the coin, she realized that she had underestimated the coins she had manufactured.
Or rather, all magical items couldn't be fully summarized merely by a description and a few elements without actual testing.
Just like this coin, which seemed to be an extension of the concept of "transaction," but only when she actually used it did she realize it had many detailed rules.
For example, "the coin is awarded only after the transaction is complete." Feng Xue's first trade demand was silence, and as the woman fulfilled this condition, the ownership of the coin transferred, allowing her to throw the coin now. Conversely, the coin "take me out of Queen's District" couldn't be used by the other party now.
