The Impatinum Unistarch was the name of the predecessor to the Impatinum Waterbe. It was formed following the unification of Vallum and Valena, and claimed all of Unistarch to be its legitimate and rightful territory. This was met with disapproval by the remaining Waterbe of Unistarch, however following the Abbantis Vellum it was able to consolidate its hold over the world, and became the Impatinum Waterbe.

The first and only Waterbius of the Impatinum Unistarch was the former Vallas Jasum of Valena, Waterbius I.