The size the picture posts may be too small. It looks like a shadow. I can't see much detail. The sun really does a good job of shining and making it hard to see the ship. After I enlarge it, the details are a bit better, but still a bit dark. What I can see in the enlarged pic does look very cool, though.
The Arcane have no ships of their own!
but they do use other folk's to fly them around
there's ton of odd ships, like Quentin's Library, Thayan Quad etc that you maybe thinking of?