History of Eriana's Vow Catalyst

Overview

Eriana's Vow Catalyst is a Triumph in Destiny 2. It requires 400 kills with the Eriana's Vow Exotic Hand Cannon. The catalyst comes from the quest The Vow, and it adds More to Give to the weapon. Some older guides list 700 kills for the same upgrade.

How to complete

1. Obtain Eriana's Vow. It was a Season 8 reward. The wiki lists it as no longer available from the Season Pass.
2. Start The Vow by talking to Banshee-44 in the Tower. If the quest is not in your inventory, check the abandoned quest kiosk in the Tower or the H.E.L.M.
3. Equip Eriana's Vow and get 400 kills with it. Shuro Chi in The Last Wish is the go-to farming encounter.

Rewards

The catalyst raises the magazine from 6 to 9, adds the More to Give perk (holstering the weapon reloads it after a short time), and applies a Masterwork.