The ritual (29) to create a koni is horrifying. Users of pravum (and msawhat, though it's not necessary) must gather the viscera of hundreds of children. They take the linings of the organs and create a massive form that is usually somewhat rounded, featuring fins and protrusions. Everything else is put inside. The bones of the children are ground into dust and their eyes are boiled into a slurry. Their hair is knotted into a huge net. The net is bound around the form, and the dust and slurry are mixed and drunk by the youngest of ritualists. Then the youngest is killed so their blood may be drenched over the form. Throughout this, special chants are used. Finally, the blood-soaked net is lowered into the ocean or sea or saltwater lake, and eventually the form is released. Within a month, the form grows tentacles and takes on unlife powered by the souls of the dead children.

The creators of the koni have control over it unless they choose to release it (and they often do, viewing it as a being of worship). If someone wishes to control a free koni, they must kill a child under the age of 10 by taking their heart out and piercing it with the bone of a yeth hound. Summoning a koni only requires dripping the blood of a child into the sea within a few miles of where they live. Raw pravic power to do either of these is considerable (29).

To capture a koni and draw its power, one must find the net used to create it, which is usually at the bottom of the sea somewhere.