The Master Þurs Rune, known as Ginnþurs in the Thursatru Tradition, serves as the central symbol embodying the essence of the acosmic Thursian Power. It emerges from Ginnungagap as an antithetical force, carrying both the fiery essence of Múspell and the icy Eitr of Nifl, hence earning its name, Ginnþurs.

Within the Ginnþurs rune, the flames of Múspell and the ice of Nifl are concealed in the forms of Sowilo and Isaz runes, respectively. Two of each rune are arranged at the bottom, mirrored by another pair atop the rune. This duality symbolizes the twin power inherent in Ginn, intensifying its antagonistic force known as Þursamegin.