Codex entry: Veilfire Runes in the Deep Roads

Acquisition
Get the Anchor Blast upgrade for the Anchor Discharge in the Shattered Library, then head back to the now half-submerged Deep Roads section via the respective eluvian. Use the upgraded ability near a collapsed entrance surrounded by gaatlok bombs to clear the way and enter the mirror you find. Use veilfire to read the runes.

Party Comments
Varric, upon seeing the mural: The Inquisitor, upon reading the runes: