"Not that sensitive."

"So I can make it a food I hate, and I won't die because the chef at the restaurant touched it before making my meal?"

"It will not kill you anywise, it foxes your magic. Optional how badly and if it also makes you suggestible and easier to permakill - you are already not rocking many passive death preventions though perhaps you mean to pick some up rankswise so that might be cheap for you."

"But does it do any of that if I just ingest microscopic trace amounts too small to taste? Because if not, then once again it seems like if you could do that you might as well just poison me the old-fashioned way, unless being a witch gives you poison immunity."

"It can! Not by itself but there are ways. Very trace amounts will not do it."

"Then it sounds like this one is just giving people an alternative way to kill me that wouldn't actually be any easier than any of the ways they can already kill me, so I'll take it. Do you know if any things are made of sweet potato that you wouldn't expect?"

"I am not a sweet potato expert."

She checks Wikipedia. "Hmm, or I could go with bananas. Wait, I should check, will proximity trigger it, or just physical contact?"

"You can have it be just contact! Bananas count as very common so that is a baseline of ten points, plus one for touch range as opposed to say two for three meters. Add four if it completely cuts off all your ongoing magic effects, two if it just cuts their efficacy down to half. Add two if it also vampires your mana away, and four if it makes you hypnotically suggestible, and two if the suggestions stick around after the bananas are gone, and six if dying with a smear of banana on you will prevent passive not being dead methods like being a lich or whatever."

"Oh, great, nice, it gets bonus points for being common. Are there existing ways to stop passive not being dead preventions, because the rest of it just sounds like it would be easier to just put drain cleaner in my drink than banana juice, except maybe the mind control. Is banana juice even a thing?"

"Rank five curse will do it."

"Well rank 5 curse is probably way rarer than bananas, so maybe I shouldn't take that one. Is it possible to put some kind of ward on myself that makes my head explode if I'm mind controlled?"

"Yes, you'd want a spellbound curse on yourself."

"How hard is that to dispel?"

"Depends on the rank. Also would pair badly with the kryptonite suppressing all magic active on you."

"What if I get someone else to cast it?"

"That's still magic and still on you."

"Oh, hey, wait, how does this interact with the luck thing? Will fruit carts be more likely to overturn in my presence?"

"I'm not sure I have seen the combination tried before. Probably, but you would not be all that likely to be hit by a banana so long as you stepped lively?"

"Hey, wait, since this normally works via touch, if someone slips it in my food, how long will the effects last?"

"Till it stops being banana. Probably around the point where if you threw up it would not taste of banana at all?"