User blog comment:Adelina Le Morte March/I've got a strange new theory on Morgana so totally nuts even I think I'm insane for wondering if it's possible! (Also, my thoughts on The Dark Tower)/@comment-90.215.38.76-20121112182438/@comment-5674726-20121114010443

I can't see Morgause using the mandrake on Morgana, even if it was possible, given that the soul-piercing effect seems to be something for those without magic.

However, I could see her using other techniques, like love bombing.

Morgana was already terrified of what would happen if she was discovered to have magic, and a trusted friend tried to murder her. The mandrake root wouldn't have been needed to make her think that the people at Camelot were a threat to her, she was halfway there by herself. Morgause chose to abandon her plan to take over Camelot for Morgana's sake, so she was inclined to trust her. Love bombing would have cemented the feeling that Morgause was the only one who truly cared about Morgana, and the only one she could trust.