Susurros

From Inga no Kusari wiki

Susurros is Sin Ruta's dormir.

Susurros is embedded in the katana that Sin's hollow form is sealed within. It is a quite unremarkable blade, its only distinguishing feature being the serrated edge upon the habaki. The tsuba is a dull silver, constructed of a ring and connected to the hilt of the katana by the coiling network of a silvery briar bush. Due to the nature of Sin's resurrecíon, the blade screams loudly whenever it is drawn. Though not the main component of his dormir, the screaming blade is incredibly irritating for all those that hear it and could lead to disorientation.

Dormir Ability

The ability of Sin's sealed blade is to extend his sword strikes. If he so wills, Sin can release an ethereal image of the tip of the blade after a swipe of the katana not unlike a gémelos sonido. This sword-tip homes in on the desired target at the speed that the sword was swung at, however just like a sword strike it can be blocked. Susurros can only be used once every two post cycles.