The outlet once had another name, but before the coming of the humans, a digger proved that it was the outlet of the Issibek. However, the river that flows north from lake Issipod and its tributary that flows south to join it are still considered to be the same river, but with two sources, one pure and one not. It is this strange river that Ilihiak's expedition to find Darakemba followed by mistake, leading them past Darakemba (several giant mountain ranges over) and eventually down into the desert of Opustoshen, where, on the shores of a seasonal river (bone dry at the time), they found bodies and weaponry suggesting that a devastating battle had been fought there. The corpses were so perfectly preserved in the desert that they could have been five or five hundred years old. Nearby, they found written records in an unknown language.

Mebbereg-Flows south from the lake Mebbekod. Not itself a pure source (the river flows into the lake from the north and then out of it on the south), but it has a pure source as a tributary (Ureg, out of Uprod). Akmaro's first settlement, Chelem, where his people were kept in captivity, was along the Mebbereg.

Svereg-Flows momentarily south from Severed, the "easternmost" (northernmost) of the lakes, then bends east and drops down rapidly from the gornaya into the vast jungle of the Vostoiless. Not a pure source.

Proporeg-Flows south from Poropod, the "westernmost" (southernmost) of the lakes, and drops rapidly to the West Sea (Pacific Ocean).

Padurek-A tributary river, but a pure source, it flows north from lake Prod until it joins the Tsidorek many kilometers downstream (north) of Darakemba. Akmaro's second settlement, called Akma, was on the shores of Prod, and it was the Padurek that Akmaro followed northward until he crossed over the pass that led down to the land of Darakemba.

Ureg-A tributary river, but a pure source, it flows south from lake Uprod and then joins the Mebbereg.