 | Name | Hydrological Studies in Byakuyakoku |
| Type (Ingame) | Quest Item | |
| Rarity |  | |
| Description | This text records the geography and hydrology of Byakuyakoku. With the sealing of the depths and the emigration of the people of Watatsumi, as well as the passing of long years, this book is now useless. |
全新强敌——「门扉前的弈局」 请问可以提取出来周本语音的文本吗？特别喜欢这个台词。但是找不到...