The River Heralds are a collection of small, nomadic bands of merfolk who were the dominant inhabitants of Ixalan before the rise of the Sun Empire. They live in harmony with the land, and their shamans wield powerful nature magic to control the elements of wind and water. They believe that the power of the Immortal Sun is too dangerous for anyone to wield—including themselves. And so they seek to protect the golden city of Orazca and steer all intruders away from it.