Dragon's Eye (symbol)
According to Rudolf Koch, the Dragon's Eye is an ancient Germanic symbol. The Dragon's Eye is an isosceles or equilateral triangle pointing downward, with a "Y" in the middle connecting the three points of the triangle together. According to Carl G. Liungman's "Dictionary of Symbols", it combines the triangle meaning "threat" and the "Y" meaning a choice between good and evil. The dragon's eye resembles a two dimensional projection of a tetrahedron viewed from directly above one of its vertices. Such a 2-D representation has been part of the logo of  the Citgo Petroleum Company ever since 1982, when it was spun off from Cities Services Company. The shape has been incorporated in the logo for the Ingress video game since its original public release in 2013. According to the in-universe mythology, the triangle represents humanity, while the hexagon represents the "Shapers". The Dragon’s Eye is also found often in the Destiny series of video games, associated with the character Ikora Rey.