Indeed, this was as you described. And I wasn't talking about anything new, just bringing up an old bug that I've mentioned before. Thanks to lfgr for fixing it! It doesn't seem to be. (And some of the saves that I tried to load were from non-custom Scenarios, so it's not an issue with the particular settings.) I remember some sniping Workers in a recent game of mine, but I'm not sure that they weren't just outside my borders at the time. If they did come in, they were definitely Gargoyle-like in thankfully still prowling around the edges of my territory and not attacking my cities. Regardless, Mistforms showed up in a couple of games and do seem to be more common now, where before they were very rare in my experience. In one game, they definitely spawned from Smoke, as I got a message like "One of your scouts encounters strange creatures moving in the smoke". This event appears to spawn multiple Mistforms, which just seems like overkill for any event. One is enough! That seems like a good change to me. It does seem rather comparable to being able to use Open Borders to pillage the other civ's improvements. It definitely shouldn't be possible under Limited Borders, at least. Not that I use Advanced Tactics. (Hopefully I got the names of those things right.) Speaking of Open Borders, there's an issue that Open Borders is "detached" from the rest of the trade deal. If Player 1 trades Player 2 Dye and Pig for Fur and Deer, one party can't unilaterally cancel part of that deal, removing the exchange of Dye and Fur but keeping Pig for Deer. But if Player 1 trades Player 2 Horse and Open Borders for Copper and Open Borders, one player can opt to remove the Open Borders part of that agreement, or remove Horse for Copper while keeping Open Borders. You can even agree to give someone Cotton in exchange for Open Borders, and they can cancel Open Borders and keep the Cotton while giving you nothing in exchange. Cheeky twerp! In short, one trade involving Open Borders is treated by the game as two trades, one of Open Borders for Open Borders and one of everything else for everything else. Of course, since you're free to cancel the remainder of the deal, cancelling part of it effectively amounts to cancelling the whole deal and then proposing the remainder as a new exchange. So the problem isn't getting stuck with some Cotton for nothing exchange, it's that the AI doesn't "get" that it needs to leave its borders open to keep that Cotton, because that's what it was for. This would be less of a nuisance if the AI weren't so fond of cancelling Open Borders these days. But as it is, the way that the trade system works treats Open Borders for Open Borders as something that a player would never agree to for something else, whereas AI evaluation of deals is such that they'll sometimes only open borders for something else.