The Queenbreaker Catalyst

Overview

The Queenbreaker Catalyst records 400 final blows with The Queenbreaker, an Exotic Arc heavy Linear Fusion Rifle. Completing and applying the catalyst adds Rewind Rounds, which refills part of the magazine from reserves according to the hits landed.

How to complete

1. Obtain the catalyst as a random reward from Vanguard activities, Gambit or Crucible matches, then socket it on The Queenbreaker.
2. Use the weapon to defeat 400 enemies. Ordinary combatants count; defeating Guardians is not required. Choose a dense enemy activity such as Altars of Sorrow, collect heavy ammunition and aim into groups to make use of the weapon's chaining shots.
3. Apply the completed catalyst on the weapon's details screen. The reward is its masterwork perk, rather than a separate weapon or currency payout.