The great koi dragon, a legend. They are also known as the protector of the koi stones.
What are koi stones? They are multicolored gems that hold ancient, raw, powerful magic.
There are twenty stones in total, each representing one type of koi. You can tell which stone represents which koi by the colors of the stones.
And if you try to steal them, it will summon the great protector of the koi, Ryūikigatsu.
Ryūikigatsu is a legendary water dragon that sleeps deep inside a cave in the middle of the earth that's connected to the ruins.
Legends say that the caves are so cold in some places and so hot in others, people can never go find her themselves. They must have each and every stone to summon him, and only five worthy people can do that and earn their trust. Only after earning it's trust will they be able to use the magic of the stones.
