Brothers in Arms Velen is one of the quests in The Witcher 3. Actually there are three Brothers in Arms quests in the game, one of each region.
Brothers in Arms Vellen is not an easy one to go through but you can secure the assistance of Keira Metz. However, she will ask you to help her with some matter first before she thinks about helping you fight the Wild Hunt.
Brother in Arms 2/2:
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