You know, I only tell the players what they missed if they plan on not returning; and it sounds to me like they ARE metagaming - unless they were figuring it out down that road. What you said in the beginning made me think of shadows, however, even before what you revealed later, and the dragon crack could easily have added to a 2+2.
But not all dragons just hang around all the time. Perhaps the dragon just packed up and moved to a better lair; or perhaps they have all kinds of traps. Or, perhaps the guy who made the dragon crack didnt know the truth; an insidious illusion hiding something else entirely.
Or something like that. Point being, the characters dont know what the players know, and if they whine, shrug your shoulders; if they acted on player knowledge, you have the right as a DM to change things on the fly.
Or maybe the shadow dragon has a mate that has just returned behind them as they are engaging the first....
But not all dragons just hang around all the time. Perhaps the dragon just packed up and moved to a better lair; or perhaps they have all kinds of traps. Or, perhaps the guy who made the dragon crack didnt know the truth; an insidious illusion hiding something else entirely.
Or something like that. Point being, the characters dont know what the players know, and if they whine, shrug your shoulders; if they acted on player knowledge, you have the right as a DM to change things on the fly.
Or maybe the shadow dragon has a mate that has just returned behind them as they are engaging the first....
