Upon casting earth tremor, the area within 10 feet (3 meters) of the caster shook violently, damaging and knocking down all creatures that could not brace themselves, except for the caster. Although brief, the intense tremor also uplifted loose earth and stone, covering the area with debris that made it difficult to traverse until cleared.
- Jeremy Crawford, Mike Mearls, Robert J. Schwalb, Adam Lee, Christopher Perkins, Matt Sernett (November 2017). Xanathar's Guide to Everything. Edited by Kim Mohan. (Wizards of the Coast), pp. 147–149, 155. ISBN 978-0-7869-6612-7.
- Michele Carter, Stacy Janssen eds. (2015). Princes of the Apocalypse. (Wizards of the Coast), p. 235. ISBN 978-0786965786.