Sword of Damocles

The Sword of Democles is a symbol of danger as it houses incredible powers. It is the symbol of the Kings. When the sword starts to crumble and decay, it's considered dangerous and is a sign that the owner has reached the "on the verge of outburst" state. In other words, the 'sword' appears and begins to decay whenever any of the Kings begin to fight seriously.

The swords, though they all look the same, are distinguished from each other by the Aura that pulsates around them. For example, you can tell which sword is Suoh's because of the flame aura, while Munakata's sword has lightning pulsating around it.