Ardigma is considered as the 2nd chapter of Yaw-Yan wherein the use of the Pambraso (Arm strike) techniques are highly emphasized. Heavy conditioning of the arms are mandatory to execute the techniques that simulate the arms as iron pipes or heavy arnis sticks. There are also various key areas that define the fighting style of an Ardigma stylist against a traditional Yaw-Yan stylist. These areas include method of training, approach to fighting, stiffness and rigidity, and execution of techniques/combinations. The 3rd chapter of Yaw-Yan is called Fervilleon. I cannot say anything as I have not trained Fervilleon yet.