Complex sentence: But even after defeating Bowman's ninja army, Bowman has one final trick up his sleeve: he has attached a mask of his own face to Fabbrizio's head, making him appear to be Bowman.
Split into simpler sentences: But even after defeating Bowman's ninja army, Bowman has one final trick up his sleeve. He has attached a mask of his own face to Fabbrizio's head, making him appear to be Bowman.