Precursor Ruins are what remains of the history of Sacred Grove. They can be found in various locations throughout Sacred Grove. Precursor rock is also are what makes up Warpstones and Precursor Hoverboards. Precursor rocks are a tan color with blue "energy veins" running along their surfaces. They still glow, suggesting that these ruins are still full of power. With the Sunstone Valley update, it was revealed that it, too, is filled with precursor ruins and artifacts. This suggests that the precursors were not just in Sacred Grove, but in fact, all over the world.