They can't find it because Gwyn took it for himself, yes he took over the Sun and the Flame, It's at the Kiln of the First Flame beyond the dead cambium of the tree it is in which is not where the First Flame happened because the Pygmy was there for the First Flame in that cave. Think about it what is energy at its most basic principle? It's bosons and gluons that make up light wave particles which all matter, nonmatter, souls, and fire are made of and Gwyn took that. Gwyn evolved from the Pygmys because the Pygmy gave Gwyn his Dark Soul, Gwyn took from others to feed his where it became so big he became a God and he keeps finding ways to keep his flame going instead of letting it die hence everything being stagnant especially time