Arco-flagellants lope alongside faithful armies in packs, their lash-like limbs whipping back and forth as they follow their priestly masters to battle. When the enemy is sighted, they are driven into a frenzied killing rage by a potent cocktail of adrenal stimulants and neural kill-signals, whereupon they hurl themselves into battle with no thought for self-preservation or restraint. Hacking and slashing with cyber-implanted flails, pneu-mattocks and cleavers, they fight on dementedly until there is nothing left of their foes but a pile of mutilated corpses.