Tatsu Tatsu no Mi, Model: Bahamut/Class System

Class System are a set of forms the drake acquire due to some intense training and the experiences drake learn thought out his adventures

Overview
thanks to all the training he had when he was young and the experiences he learned thought out his adventures, drake came up with several forms out side the the normal zoan devil fruit forms. each of these forms focus on a specific unique styles of combat to the user granting them an advantage in combat for example Knight Style focuses on physical combat while Magician Style focuses on Dragon Force-Based combat