the creation of the world
... that according to Slavic mythology, the creation of the world required the cooperation of a "good god" and an "evil god"?
... that according to <a href="./Slavic_paganism" id="mwAag" rel="mw:WikiLink" title="Slavic paganism">Slavic mythology</a>, <b id="mwAak"><a href="./Slavic_creation_myth" id="mwAao" rel="mw:WikiLink" title="Slavic creation myth">the creation of the world</a></b> required the cooperation of a "good god" and an "evil god"?