The goblins were secretly sharpening their fangs against their own allies, the orcs, who had taken control of Bilbaron Fortress. The goblins' long-term goal was to build a flying fortress, the Sky Terror.
Recovered designs show it to be the size of a giant whale, able to hold over 100 goblins. It boasts twenty massive cannons, and can move at such a speed that it would be able to cross the length of Hydeland in one night. The amount of skycrime the goblins could commit with it is unfathomable.
Thanks to your efforts, their dreams were crushed before they could come to fruition. You likely saved the entire kingdom.
- The art appears to be a homage to the airships of steampunk, such as the airship from Hayao Miyazaki's 1986 animated film Laputa: Castle in the Sky or the airships of the Final Fantasy series.