Used Karma - S6-E13
Corrected entry: When talking about going back to vanquish the hive king, Piper says, "What if this is the demon that gets to Wyatt?" But in the previous episode, Chris came forth and said that there never was a demon that attacked Wyatt, it was Wyatt himself that became evil.
Correction: He never implied that Wyatt became evil under his own steam - something still had to influence him.