Flue Empire

Background
Furu Empire, also known as Ancient Empire, was an empire that controlled majority of the world. It's one of two major empire at ancient time, the other is Saga Empire.

In the past human ruled 90% of the world, all of demi-humans were enslaved by human except the demi-humans in Orc Empire and Saga Empire. Wild Boar King, the current king of Orc Empire, despite knowing that he couldn't win, turned on the world, reduced the power of the human. He successfully destroyed Furu Empire which is known for its invincibility, as a result the empire fell into ruin.

Legacy
Although Furu Empire was laid to waste, some have survived onslaught of Orc Demon Lord, for example Second King of Shiga and foster son of Shiga Yamato, Sharlick was son of last Emperor of Furu.

Ancient Empire Gold Coin
The Gold Coin is quite big and heavy. It's about as big as a 500 Yen coin and as heavy as five 100 Yen coins, it's weight about 30 grams. Satou got 101.2K worth of it from the loot of Dragon God Valley.

Crimson Treasure of Furu Empire
Furu Empire money made from Philosopher Stone.