One Bad Spartan Spoils the Bunch

One Bad Spartan Spoils the Whole Bunch was a virtual representation of one of Kassandra's genetic memories, relived by Layla Hassan through the Portable Animus HR-8.5.

Description
Spartan traitors were fueling a rebellion by arming helots with weapons. Brasidas sent Kassandra to deal with these traitorous Polemarchs to gain favor with the Spartan King, Archidamos.

Reference

 * Assassin's Creed: Odyssey