▸ Reveal an unwelcome truth
Establish something as true, something that they really wish wasn't. Maybe it was true all along but you're just revealing it now. Or maybe (especially as a hard move) you're deciding right now that this bad thing is true and letting them know. Both ways work.
This is a great move to use when they Know Things or Seek Insight. On a 7+, you owe them honest answers or interesting (maybe useful) information, but there's no reason they have to be happy about what they learn. And on a 6-, you can really twist the screws.
"'Vvvasil? Heavvvens, no. Vvvassil leffft town thhhis past autumn. Back down to Lygos, I heard.' He smiles, and it's like he has too many teeth. "But ssssurely we can make some sort offff… arrangement?'"
"What happened here recently? Well, there's like a dozen sets of prints in the mud, all churned up like there was a fight. A few splashes of blood, too, on the foliage. It's pretty clear Lowri got jumped by the crinwin."
"Oof, a 6-? Well, you search the hills for the rest of the day and... I guess you don't find her? No, wait. You know what? You do find Cadi. Maybe half a mile from the logging camp, you find her body. Something stabbed her, impaled her right through the gut."