History of At All Costs

At All Costs is the flawless triumph for the Salvation's Edge raid: finish every encounter with no fireteam member dying or returning to orbit. A disconnect also breaks it (Destructoid).

How to complete

1. Run the raid with a coordinated team that has already cleared it, ideally with all challenges known. Note this is a single continuous run: the whole clear counts, not each boss.
2. Never wipe: a death ends the attempt, so play defensively, use Well of Radiance/healing and keep revives from being required.
3. Pay attention to the mechanics that punish mistakes, such as resonance management and Verity callouts.
4. If anyone dies, abandon and restart; checkpoints do not save the flawless.

Rewards

5 triumph points. Per Destructoid it rewards the Diametric Crush shader and a +3 increase to the drop rate of Euphony. It is a required part of the Iconoclast seal.