An ancient book about fierce warriors from Wadatsumi that Reido is reading for fun. Details of their battle tactics are recorded in fine detail, and so he believes that there may be something for him to learn that he will be able to apply on the battlefield even today.
Attributes
Attributes: Stop Res Up, Light Res Up, all ATK Up for Dark units, Enables Master Ability "Secret Technique - Braced Wallop" (Casts Auto Heal on self)