On a similar note, what the heck does it do?
Checking before and after the twist, it doesn't seem like it causes much bleeding or pain, if any.
Also, is it just me or are adamantine weapons really awful? I picked up a short sword from my old fortress and started using it to hack up the goblins and trolls and such, but it seems like it can't cut anything at all if there's the slightest bit of armor blocking it. For example, I had one troll unconscious, and I was trying to slash his leg off, but could only bruise the fat at best. After pulling his cloak and robe off, I was able to cut it off in one slice. I thought adamantine went right through armor? And it was only cloth, geez.