Math: Upside Down Triangle Symbol

At the very base of the Sunken Valley sat the Singularity Stone, an artifact from a forgotten civilization that understood the math of the universe too well.

But to Master Elian, it was the "Del"—the symbol of the Descent. Upside Down Triangle Symbol Math

"Because nothing in this universe likes to stay where it is," Elian had answered, his voice raspy from the valley’s sulfurous wind. "Everything is sliding. Heat flees to the cold. High pressure screams toward the void. Rivers butcher mountains just to find a lower place to rest." At the very base of the Sunken Valley

"Why do we study the gradient, Master?" his youngest apprentice, Kael, had asked that morning. "Everything is sliding

The ink on the parchment was older than the empire, but the symbol at its center looked like a blade pointed directly at the floor.

Elian stood at the edge of the Sunken Valley, holding a brass compass that did not point north, but down. The valley was not a natural gorge; it was a perfectly smooth, inverted cone carved into the crust of the earth, a mile wide and a mile deep. It was a physical echo of the symbol itself.