Complex sentence: Masamune uses the Buggle Driver Ⅱ and Kamen Rider Chronicle Gashat (master version) to transform into where his primary form is and he is capable of manipulating time by simultaneously pressing the A and B buttons on the Buggle Driver Ⅱ.
Split into simpler sentences: Masamune uses the Buggle Driver Ⅱ and Kamen Rider Chronicle Gashat (master version) to transform into. His primary form is where he is capable of manipulating time by simultaneously pressing the A and B buttons on the Buggle Driver Ⅱ.