This is one of the sacred swords that kings and queens used for crowning ceremonies in my world of Dragonia, specifacally in the western part of Plain of Kings. After the coronation, the new ruler would go to a sacret spot (usually on a hill) and plant a ceremonial sword in the ground there, to signify his new reign. The sword would stay there until the monarch died and his or her successor would then take the old sword, place it in the old ruler's tomb, then place a new sword on exactly the same spot and the cycle continued. The Morkels, inhabitants of Plain of Kings, believed the sacred sword to be a kings' or queen's offering to the gods in exchange for a prosperous rule. The custom died out when the Yfrigians, a Morkel tribe, conquered the area.