Flayerkin are twisted Chaos Marauders who have replaced their hands with wickedly sharp hooks and claws. These claws serve a dual purpose: First, they are extremely effective weapons, as they are an extension of the Marauder's arms. Second, they allow the Flayerkin to gain purchase on nearly any vertical surface.
Some Flayerkin arise through mutation, and others are created by barbaric surgery. The resulting creatures are basically Human - or at least, humanoid - but their arms end in great blades and hooks rather than hands, and they trail heavy iron chains that are fused to their spines. During the siege of Middenheim, Archaon sent hordes of Flayerkin scaling the Ulricsberg, trailing chains behind them that their allies could climb. All were killed before they could reach the top of the rock, and dozens of the creatures were left to hang where they died.[1a]