After a rushed work on the berms, the laborers start to gather wood for the towers. They were attacked and some were killed. A vortex wraith and a mix of undead nearly killed the heroes. The chief of the fallmount goblins arrives to warn the outpost of a ritual circle nearby that is being used to create very powerful undead. This circle is not necessarily evil and could later be used for better means.
The Order of the Golden sphinx sends supplies and reinforcements.