It's a potion that can only be made with Potionmaking II, so yeah, it's just really rare for someone to sell it! Looking forward to trying it out and seeing just how it cuts those keys. :o
Well, I tried it. It makes RANDOM keys from your existing stock. If you have dreams of grinding out a bunch of teal-white triangles - keep dreaming. I get mostly the common ones. It's another fairly expensive item to produce with low payoff. (vague references to Rainbow Juice, Potion of Animal Youth and Ancestral Spirits not unintentional)
Yeah, given the low low price of the key to AB and NN right now, the cost of the keycutter potion makes it a bad investment. It's a novelty thing. It might make for a fun game of some sort.
A random key? How disappointing. I'm glad I didn't waste herbs on it. I was expecting it to let me into a door one time with any key I happened to have.
I made some keycutter tonic the other day, used it once, realized it's random and then sold the remainder at auction, haha. I probably won't make it again!
I've gotta hope that Keycutter Tonic will serve as an ingredient in some further, more interesting and useful potion. Because right now, it's a giant waste of time, energy, and resources.