Complex sentence: This new form allows him to access higher level of flame output and a new technique called XX Burner, which works by having the soft flames shoot out back from the thruster on his gloves and the hard flames shot from both of his hands.
Split into simpler sentences: This new form allows him to access higher level of flame output and a new technique called XX Burner. This works by having the soft flames shoot out back from the thruster on his gloves and he fires the hard flames from both of his hands.