There seems to be a problem in one Shadow Rune scenario after mixing the Labyrinth of ruin extension...

In Labyrinth of ruin, you get a couple of extra objective tokens ( 7 ), and in this scenario it says : "If all objective tokens are on the map at the same time..."

Technically, it means that it take 7 more turns to win (for this condition).

There is no way to differentiate objectives tokens from the core game from the ones in the extension.

I hope they'll add an errata for that in the FAQ.

I had emailed Justin Kemppainen a while ago about this. The limit should be 10. I bet it gets errata.

I agree with Mustard, it will likely be errata'd. This is the kind of thing I think they need to work on paying attention to. When they're making a game they know is going to get expansions (like Descent), always write the rules under the assumption that new rules or components WILL get added later.