The chasm was the cause of the Reod. The chasm came about by unnatural events.
Because the chasm changed the landscape of Arelon significantly, it also changed how Aons needed to be drawn.
The chasm is unlikely to have been caused by Odium's visit to Sel. The Reod occurred about ten years before Elantris, while Odium's visit came far earlier than that (at least several centuries, as seons did not exist before Odium appeared).
|Characters||Raoden · Sarene · Hrathen · Dilaf · Galladon · Eventeo · Kiin · Iadon · Roial|
|Places||Opelon · Arelon · City of Elantris · Duladel · Fjorden · Teod · JinDo · Svorden|
|Magic||AonDor · Aons · Dakhor · ChayShan · Seons · Skaze · The Shaod · Forgery · The Pool|
|Mythology and Lore||Devotion · Dominion · The Dor · The Reod · Shu-Korath · Shu-Dereth · Shu-Keseg|