The Feylines represent the heart of the Riverine Heartlands, a vast expanse of golden grasslands defined by the Atrix Web. This living filigree of mana conduits pulses just beneath the soil, connecting diverse settlements of centaurs, fey-touched humanoids, and goblinoids. While the land appears wild, it is a highly magical frontier where diplomacy and trade travel along literal lines of power. The merging of twin rivers creates a fertile corridor that sustains both sprawling cities and nomadic camps.