Please read the description before purchasing Crystal Key is the key to open the gate at Okuiya Cavern which contains "Crystal Demon - Lower Moon 3" which when killed will drop an item in the form of Crystal Essence. Trade Mechanism: 1. Chat after purchasing to confirm 2. Determine the meeting place between Grimm dojo in Okuiya /or Soup Place in Hayakawa and include it in the chat 3. Wait for the seller to reply to the chat and provide a server to enter together / or if you have your own server, you can enter it directly too 4. Join the game 5. The seller will provide items according to the nominal value purchased Store opening hours: 09.00 - 22.00 For Friday the shop opening time is 12.30 so please wait Purchases outside of shop opening hours will be served when the shop is open If there is a suggestion for an item that you want to buy, just tell the seller directly because the seller is willing to do the grinding for you :)