So, apologies for not getting this out sooner. If you have BGAs planned that you want to change due to this, go ahead and do so.
Those of you who had attention to spare from the large construct chasing you out of the ruins noticed that formerly-sturdy walls were quickly crumbling. By the time you reached the interim base camp, it had been hastily packed up, and the Explorers' Society personnel were evacuating as quickly as possible. The armored recesses that turrets had popped up out of were melting and sparking with magic, and then slumping into sinkholes.
By the time the construct reached the main clearing before the doors you had so recently gone through, the buildings and walls behind it were falling, collapsing into the ground, and then collapsing further, cracks opening into what must have been tunnels beneath. When you turned to survey what was left after your pursuer had crumbled into dust and beyond, there was nothing left but a wracked and desolate wasteland. Few were the stones left standing above the height of a man's waist, and all sense of the flow of magic in the area was gone.
The Explorers' Society expedition heads were not entirely unhappy, as they were able to scavenge some interesting artifacts from the ruins.
OOC:
As far as rewards go, each member of the party will receive 3 gold. Further, you have a choice: pay 5 VP for a 1/Event Resist Elemental damage (renewable every 6 months for 5 VP each time) OR pay 5 VP for a random draw from the selection of artifacts that were found in the ruins. (This includes the three crystal tablets you found.) Once drawn, you will receive the item, with a description of its usage and effects.
~GM Jeremy