Arriving at the fortress, what they were seeing wasn't what the Redwings had expected, but at the same time they didn't really know what to expect. They only knew based on the information that someone had attacked another fortress inside the shadow continent.
It was something that had never been achieved before the Redwings had accomplished it, but a short time after and there was news of another fortress that had been attacked. What they didn't expect was the place to look as if it had been almost totally destroyed.
At the top of the giant tree, a strange strong black material that was comparable to glathrium was used to build the fortresses. Their main trait was the fact that they were fire resistant, yet looking at the outside side walls it was hard to believe that was true.