Reath Silas's lightsaber was powered by a green kyber crystal, and was decorated with a green crystal embedded in the hilt and gold decorations that extended from the weapon's emitter to its endcap.
Reath Silas's lightsaber first appeared in the young-adult novel The High Republic: Into the Dark, written by Claudia Gray and released as part of the Star Wars: The High Republic publishing initiative on February 2, 2021.
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