Müglitz River

It rises in the Czech Republic as Mohelnice on the northeast slope of the 881 m high Cínovecký hřbet (Zinnwalder Berg), near the Bohemian village of Vorderzinnwald, which was devastated after 1945. After a few hundred meters it reaches the German-Czech border and forms a winding border river for around 5 km. Here in the upper reaches it is called the Weiße Müglitz. Shortly after the river has completely entered Saxon territory near the village of the same name, Müglitz, it picks up the Schwarzbach (Czech: Černý potok, formerly also Sörnitz or Sernitzbach) from the right, which flows from numerous spring arms into the “Schwarzen” near Adolfov (German: Adolfsgrün). (boggy) meadows”.[3] One of the arms forms the state border for about 2 km.
de.wikipedia.org/wiki/M%C3%BCglitz_(Fluss)