How to unlock spirit of war Akihito Crystal Ball?

The cat secretary spent 30 red crystals to unlock it. In the game "Soul of War", the crystal ball can be unlocked at the Cat Secretariat for 30 red crystals, and then it can be used on the table in front of the mage. Mainly to classify props, each prop has its own entrance. Some props belong to several different items at the same time, and they can be divined in a crystal ball every time. If you choose an entrance, you can easily buy it in the dreamland or choose the props for that entrance in the prop room.