Found in the frozen southern continent of Erishkagan (which would translate in our language as "Frozen Hell") this river is thought to be unique in the whole of Acqua. Large sections of the river bottom are coated in amethyst, and the magical emanations from such a large concentration has melted the ice above, creating a fast-flowing and warm river, with it's own weather system. When the heat of the river meets the cold dry polar air, it forms great clouds of mist and when the clouds grow big enough they rain, thus providing the river with the water it needs to keep on flowing.
The Canbu tribe once lived here and worshipped the river as a god, since it gave them fish and shellfish, cassava roots and other edible plants, clean water to drink and enough warmth to live,as long as they stayed close by, with only minimal shelter from their yak-hair tents. They took great care to keep the river clean; excrement had to be buried in latrines hacked out of the ground in the nearby permafrost. Bodies were buried in the snow, rather then being cremated (with very little wood, and all the wood that was there used for something, cremation was inpractical) or floated down the river.
With the right prayers, and the fact that dead bodies were never total stripped naked, the creation of an Ice Ghoul was generally avoided. Because they were members of a single tribe and the land around them was too cold for other rival tribes, warfare was avoided. Murderers and river-poisoners were executed, whilst the penalty for other crimes was whipping or exile for a certain number of days or weeks.
All this changed when a squadron of ships from the De Madden Company discovered the river and the traitor Jade Alksnis , hungry for power, told the officers of the secret of the river. Mining with high explosive began and the Canbu were routed by superior weaponry and diseases which they were not used to. Now vast areas of the river have been dug up and the precious amethyst removed, causing the affected areas to freeze over within weeks and creating vast, still lakes that have become dirty from human excrement, mining detrious and waste.
With no respect for the river, it is likely that within a couple of decades the greed of the Company will have destroyed it, both through river pollution and through removing the amethyst which keeps it warm, leaving just filthy ice, and condemming the few survivors of the Canbu tribe to extinction.