Fenrus is a finely crafted blade, a wolf motif adorning the hilt of the sword. The blade is kept in impeccable shape and is of wonderful craftsmanship. The blade it's self has been reforged using elven steel by Ranger Lady Aeriyth Dawnsorrow following one of the battles to reclaim Gregor's Crossing from mercenaries that had besieged the town. The blade was revealed to have been made partially of Ash Iron; the odd metal only found in some family blades or armor of Ashen Coast families.
Lord Grayblade has used the blade since being gifted it by Xavier Gregor. Following the damaging of Bite, Berenal's gun, during the Second Battle of Andorhal, Fenrus saw the commander through the rest of his time on the field. When deciding to refine his melee skills and learn how to fight in plate mail, the commander chose Fenrus as his weapon of choice. Though initially poorly skilled with the large sword, Berenal eventually became accustomed to its use. However, it was later shattered during the battle to reclaim the docks of Gregor's Crossing.
Berenal had the blade reforged using elven steel by Ranger Lady Aeriyth Dawnsorrow. This was done as a sort of insurance policy, as elven steel blades are stronger when reforged, and would prove useful if the blade was ever shattered again. The Blade was shattered a second time during the Blades' excursion to Hath's Vigil, where Berenal used it to deflect several hard blows from a Forsaken wielding a large maul. The blade was broken after the commander was forced to use it to off set the oncoming blow. He later used the shattered half to viciously stab the undead to death with the jagged broken edge.
With Bite having been restored, Fenrus alternates between the commander's main weapon, being used when he dons plate mail into battle.