Yaoguai Core

With their heart stained by cruelty and impudence, the lesser yaoguais can only forge immature cores within them. These can be used in crafting weapons.

妖怪核心可用于制作各种武器。

Yaoguai Core can be dropped by some enemies and found in chests. An unlimited amount can be purchased from Yin Tiger for 900 Will each.