Darkest Depths Triumph Destiny 2: The Book, Not the Run

Most guides tell you the Darkest Depths triumph needs a 30-minute Legendary clear of the full Oblation chain. The game's own triumph data says otherwise, and the timed run has a separate triumph entirely. This guide covers what Darkest Depths actually asks for, the route through the Catacombs to the Oblation tome, and how the surrounding triumphs fit together.