Serrated Death

The Serrated Death was a kukri obtained by Jacob and Evie Frye during the nineteenth century. This silver blade featured a skeleton-shaped handle and a serrated blade, from which it derived its name. The Frye twins received this weapon as a gift from Ned Wynert, after helping him steal valuable cargo from the Blighters all over London.

Reference

 * Assassin's Creed: Syndicate