Ethersworn

The Ethersworn are a group of mages on the Alaran shard of Esper. 
The Ethersworn, consisting of humans, vedalken, and even sphinxes, are dedicated to infusing all life on Esper with etherium. In accordance with the teachings of the sphinx Crucius, they maintain that if enough of Esper's life is fused with etherium, the plane will transcend its mortal and physical limitations. Their quest is called the Noble Work, and they believe it to be the answer to the imperfect wildness of regular old organic bodies. The Ignoble Flesh is the term for a splinter group who takes this philosophy to an extreme.Doug Beyer & Jenna Helland (2008). A Planeswalker's Guide to Alara, Wizards of the Coast. ISBN-13 978-0786951246 Its adherents believe the flesh is fallible and impure and should be shed through the eventual replacement of the entire body with etherium. The very few who have achieved this goal are called aether-liches.
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