The Sea Whip's Fetter is an amplifier that consists of the seven golden scales of Rusalye.


Siege and Storm

At The Darkling's behest, Mal tracks down the Sea Whip. After a violet exchange with the Darkling and his guards, Alina kills Rusalye with a single blow and cuts seven scales from the beast to harness as an cuff-like amplifier that circles her wrist.

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