Ferothraxes are Dervishes found in the Tarnished Coast in pairs or trios only. They are hard-hitting scythe attackers and can dish out a surprising amount of AoE damage.
These monsters may be based somewhat on Therizinosaur. These medium-large dinosaurs had disproportionately large claws on their forelimbs that are similar to the scythe-shaped claw of the Ferothrax. Note however that the head is more akin to a Carnotaurus or similar theropod head.