Serpent's Tail Mine

The Serpent's Tail Mine was a geological puzzle which had existed since 4th century.

Discovery
The mine was discovered by Agasha searching for a vein of ore within the Dragon mountains. The vein they discovered were entwined deposits of gold and iron ore. The mine earned its name after the mining tunnel coiling deep into the mountains, which had the same fashion of two embattled snakes. Peasant workers named the continuing trails Miko and Malco.

Third Deposit
In 1161 the mining process uncovered a third deposit, of jade fused with the two trails of iron and gold. The twisting trails were actually crafted by two angry kami, one of Fire and one of Earth, chasing each other until they collided and formed jade in an untraditional manner.