How did I not see the notification for this? I'm so sorry ;-;
Truth be told though I have no idea. Worst thing I could think of would be to have a poisoned tongue and feed them all these gentle sounding words that'd slowly warp their mentality until they're ready for you to snap the final strand, leaving them in a state of... well... let's just say it leaves them broken and lost emotionally. I can't get very creative though but that seems like it'd be the most effective way to do it. Minimal effort without casting you if you do it right as the villain in the person's eyes.
....I may or may not have been on the receiving end of this at some point in life. Let's not delve past that :U
ANYWAY how've you been since... two weeks ago /sobs over that ;;