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If Dimitri was sided with, Myson is encountered in Imperial Year 1185 during the final battle between the Holy Kingdom of Faerghus and the Adrestian Empire at the Imperial Palace in Enbarr. Edelgard had allied with Those Who Slither in the Dark to bolster her forces, and Myson was one of their agents. Myson fought alongside the Imperial army during the battle, but he's eventually slain, making the other members retreat.
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