History of Become Naeem's Avatar, O Vengeance Mine

Become Naeem's Avatar, O Vengeance Mine is the solo flawless triumph of the Warlord's Ruin dungeon: complete all encounters solo without dying or leaving the activity. It counts toward the Wrathbearer title and seal.

How to complete

1. Own Destiny 2: Lightfall (or a Dungeon Key) and start the dungeon via the quest from Ikora Rey.
2. Run all three encounters alone: Rathil, Broken Knight Chieftain, Locus of Wailing Grief, and Hefnd's Vengeance. Do not die and do not leave the activity.
3. A Bungie forum thread notes the in-game wording is misleading: both conditions apply, and a solo run with deaths did not grant the emblem.

I found no detailed solo strategy on pages I opened. The sibling triumph She Stood Alone only requires a solo clear without leaving.