Wind Rough Gemstone

In ancient times there was a cave in a country far away, where the storms were asleep. All the winds of this country blew towards the cave and subsided in its depth. One day, a wandering female warrior who was searching for the "Hidden Wind Treasure" found a Rough Gemstone in the cave. They say she broke it to unleash the winds inside and appropriated it. When the owner of this gemstone shakes his weapon, the storms inside awaken incredible power.