Arc Fireteam Completion

Arc Fireteam Completion is a 15-point triumph in the Duality dungeon: complete all encounters with a full fireteam of Arc subclasses. It is one of the triumphs needed for the Discerptor title, alongside Solar and Void versions.

== Objectives ==

Sorrow Bearer defeated, Vault unlocked, and Calus's greatest shame defeated.

== How to complete ==

• Use a full fireteam of three, each on an Arc subclass: Arcstrider, Striker or Stormcaller. A forum report says a two-player Arc run did not register.
• Do not swap subclass mid-dungeon.
• The triumphs are reportedly buggy; another player's late joiner on a different element still counted for them.
• Owning The Witch Queen or a Dungeon Key is required to access Duality.