"Theologians theorize that Ytaris gave birth to four children: Leviathan, Phoenix, Tempest, and Zaratan. Each was given a section of her domain, according to their respective control over the elements. This land is called Primordius, and I can say from firsthand experience that it is not a place suitable for man. I have encountered beings as tall as our mountains, fires that rival our star, tides that swallow whole forests, and storms without cease."
-Excerpt from Beyond the Material: Volo's Guide to Extraplanars