Lord Barbarian's Axe of Fury – assembled from the artifacts Ogre Club + Ogre Shield + Cyclops King Tunic + Archmage Crown,
giving all creatures (except ranged units) one additional attack in melee combat (i.e., Crusaders and Raiders attack three times).
The physics mod states that it is deactivated. Why, who, and how was it deactivated? I tested it – assembling these artifacts doesn't work. The information was taken from Wikipedia.