Midnight Sea

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Midnight Sea
Type Ocean
World Lumar
Universe Cosmere
Featured In Tress of the Emerald Sea
This page or section contains spoilers for Tress of the Emerald Sea!
This information has the ability to potentially ruin elements of the plot for the reader. Proceed with caution if you have not read this book.

The Midnight Sea is an ocean on Lumar, made up of Midnight Aether spores. The only known inhabited land was the Sorceress' island, where the Sorceress lived until she was driven away by Tress and Hoid. Like all seas on Lumar, it is pentagonal in shape.[1]

It is notably warm compared to other seas due to taking in large amounts of heat from the sun due to their deep black colour.[2] The sound of the seethe apparently is also different from the other seas, but it is not clear if this is a true difference, or merely a psychological effect.[2]

The Midnight Sea is the most dangerous of seas on Lumar due to the presence of the Sorceress and her Midnight Essence servants, which hunt those who cross into their domain.[3][2] These are hard to notice in the liquidized spores, as they as black as the spores themselves, thus camouflage into it.[2]

It borders the Crimson Sea,[3] and four other unknown seas.


  • Prior to the release of Tress of the Emerald Sea, Brandon suggested that Midnight Sea is sometimes called "Sea of Night"; however, the phrase does not appear in the book, making its canonicity questionable.[4]


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