The Animus Malorum is the relic of Sergeant Attica Centurius, borne by the leader of the strike force — a champion's aura that drags the newly dead back into the fight. Once per battle, when a friendly Damned fighter within 6" of the bearer is taken Out of Action, the controlling player rolls: on a success, that fighter returns to play at once, set up in base contact with the bearer, or as near as can be, with a single Wound remaining. It is a roll, never a certainty — even the Animus Malorum cannot command every dead man to rise.
This is the battlefield face of the Legion's refusal to stay dead. Where an ordinary warband counts its fallen and grieves, the Damned may simply stand a corpse back up and send it on.