"The Earth's Core is the sun and the light of souls, the light which lighteth every man that cometh into this world"
The Yskay tribe was located at a rather unknown territory in a bygone epoch. As did many ancient tribes, the sun was gloriously worshiped by all of the Yskay, which let them see the sun as their ultimate object of desire. Research by highly profiled scientists such as Gottfried Y. Leibniz has shown that the Yskay regarded the sun as the earth's core itself - or as the Yskay would describe it: their bijective image respectively. Thus knowing the path to the middle of the earth is equivalent to reach out for the sun.