The Knife’s latest, “Full of Fire,” is filled to the brim with tension, power, and force. It’s been a long time since the brother-sister electro duo has graced us with a new single, but the wait was definitely worth it. Seems like vocalist Karin Dreijer-Andersson’s acclaimed side-project, Fever Ray, has rubbed off somewhat. “Full of Fire” is nine minutes of dark, delicious, industrial sounds.