Thalassia is an island in The Skull region of the Wushanko Isles. Sulphur is mined here to make gunpowder. The highest point of the island holds the khan's jade palace. The Khan of Thalassia is a cruel man named Tombi. During 'A Jade Frog in the Throat', you help Ling, a young assassin, kill him and replace him with another man.