In the months leading up to the goblin invasion of Brightshore, a party of adventurers discovered a cove on the southern coast of Shady Hook. Inside they found a caravel under construction by goblins and bugbears. Magu, the leader of the goblin army, was there along with her shield guardian.
The adventurers were eventually forced to retreat. The caravel attacked Brightshore and was destroyed in the Battle of the Bay.