Greedy Kingdoms : Treasure Expansion

From the box cover:-

'The two rival kingdoms had various tresures in their treasure houses, such as an ancient holy sword and a magic book sealed by a great sage. Desperate to build royal palaces faster than his rival, each of the two kings came to realize that his treasures would offer a wealth of advantages.
"I will use these treasures to build palaces even more quickly!"

Thus the fierce rivalry between the greedy kings became even fierce'