The Hyoketsu Senkai (氷結浅い海, Freezing Shallow Sea) is the bloodline of the Seishi clan of Konoha. It allows the user almost complete control over the elements of water and wind, though in rare cases some have been known to activate the lesser known affinity towards the sub-element ice. Currenty, Shiki Seishi is the only known member of the clan, with or without the bloodline; it is speculated that others exist, but within other nations.