Discus of Ares

a lesser version of Ares's Shear

In the Dawn War, Ares battled Bryakus in the wasteland Felbarum. The then archangel Ares used his shield Ares's Shear in this epic combat.  One of the properties of this artifact was that it enlarged whenever it was hurled in combat, matching the size category of the target. When the shield's razor edge severed one of the necks off of Bryakus it became lodged in the primordial's great body. Bryakus's blood ended up destroying the great size of the shield and breaking it into many parts. The destruction of Ares's Shear left pieces of arjale scattered about the battle site. This arjale of Ares's Shear has been used to make a few powerful magic items, like the Discus of Ares. - "a mortal version of the legendary Ares's Shear".