Arbiter is an oversized battleaxe with a red-and-black color scheme. The red blade is large and curves over some of the shaft as many bearded axes do. The grip is the same as his Rebellion, owing to the weapon's shape-shifting quality. When it is used to attack, it leaves behind a dark red streak in its wake, and an eruption of red and orange sparks as it hits the ground.
The Arbiter also has Golden, Bone, and Samurai skins available through DLC that can be acquired from pre-ordering the game; or from buying the bundle pack for 2.00USD.
While exploring the ruins of his childhood home, Dante comes across an old portrait of his father, Sparda. While observing the portrait, Dante is ambushed by a pack of demons. After defeating them, the winged carving at the base of the portrait begins to glow red and seems to silently call to Dante. Dante moves closer and reaches into the round carving, but his hand is quickly magnetized to the metal. Dark red, demonic power begins flowing from the carving, through Dante's arm and into Rebellion, which transforms into Arbiter.
Arbiter is a powerful weapon. It is far slower than the Rebellion, but packs enough punch to crack enemies' shields. It doesn't have nearly as many attack options, and is well-suited for combat on the ground. What attacks it does have are usually enough to keep enemies at bay with the shockwaves it can produce. Arbiter should not be used against fast opponents unless they are stunned, and is risky to use when surrounded, as its attacks leave Dante wide-open for extended periods.
With Arbiter's heavy strikes, the weapon can also be used to break open brittle walls and other objects.
Acquiring the Arbiter rewards the player with the It's got to stay in the family award.
An "arbiter" is someone who mediates a dispute, like a judge.
In gambling, a flush is a poker hand where all five cards are of the same suit.
The award "It's got to stay in the family" may be a reference to a line said by Dante to Nero in Devil May Cry 4 when Dante was demanding that the Yamato be given to him.