Which Prue Is It, Anyway?

T1, E16: A dangerous mortal uses a crystal sword to suck powers out of people and targets Prue as his next victim. To help combat him, Prue casts a spell to strengthen her powers, only it ends up cloning her twice. Using his sister as bait, Gabriel methodically attempts to trap Prue. Meanwhile, Piper contends with the dreaded annual inventory at the Quake.