The area became cold as many parties felt horror course through their veins. If what Darius was saying was true, then they had avoided a serious catastrophe by being reticent. Maybe not full annihilation but at least 60-75% of their attack force would have perished in a full confrontation.
Even Elijah was shaken, as he was the most knowledgeable person present. His heavy workload in management didn't allow him free space in thinking up other things, but after throwing all his duties away, he had been free to put past facts and events together to form a conclusion.
It wasn't just him, but Sothe and even Darla trembled as they felt it made sense. The Bone Dragon had been fierce, but not to a degree that it had felt impossible to defeat. With each engagement, they had found new flaws and their ability to push it back had become stronger compared to their initial battle.