Complex sentence: The attack fails, as Äs merely activates his Vollständig,, and infects Rukia via his enhanced powers before being sliced through by a newly recovered Byakuya.
Split into simpler sentences: The attack fails, as Äs merely activates his Vollständig,, and infects Rukia via his enhanced powers. Before he can do any more harm, his attack is sliced through by a newly recovered Byakuya.