Image: Rebel Wolves / Bandai NamcoOfficial screenshot from Rebel Wolves / Bandai Namco.
Arbiter's Blade unlocks when you restore the Sword of Saint Mihai through the quest Forge It Anew. The reward is a Legendary sword, so it is worth doing for the weapon alone.
1. Finish the quests that lead into the sword line, including Night Terrors and A Monk and a Saint. 2. Collect the three shards of the Sword of Saint Mihai. 3. Take them to the Uriash blacksmith in the Briar Sloughs. 4. Temper the repaired sword in the cave the quest points you to. 5. Complete Forge It Anew to get the Imbued Sword of Saint Mihai and the trophy.
Do this before you chase Gear of the Gods. The sword fills your weapon slot with a Legendary item, and the matching armour set from Arbiter's Regalia uses the same blacksmith.
A Monk and a SaintIn A Monk and a Saint, Coen searches Svartrau for clues to a sword said to be hidden in the city's crypts. It ends in a tough boss fight and gives you the broken sword you need for Forge It Anew.
Forge It AnewIn this quest Coen reforges a broken sword from three scattered shards and its hilt. The result, the Imbued Sword of St. Mihai, is one of the strongest weapons in the game and worth the long chase.
Uriash VillageUriash Village is the hidden mountain home of the goat-like Uriash and the Bakr clan. You reach it in Song of the Mountain, and only if you go in peacefully.
Image: Rebel Wolves / Bandai NamcoGear of the Gods
Fill every equipment slot with Legendary items.
Image: Rebel Wolves / Bandai NamcoArbiter's Regalia
Complete A Bulwark Against Darkness to unlock the full Arbiter's armour set.
Image: Rebel Wolves / Bandai NamcoThe Outcast
Help a character find a new path in life.