As Weisshaupt crumbles, you must either knock out the First Warden in Dragon Age Veilguard or try to talk him around

The Warden Vault is a side quest found in the Rivain Coast region in Dragon Age: The Veilguard. The quest consists of a few short puzzles that you need to solve in order to open the three locks that grant you access to the actual vault itself, which contains lots of useful rewards - including a unique-rarity ring.

The Veilguard’s choices are personal and focus on your team’s relationships and life paths. However, one of the big, world-changing ones comes early on, shortly after you recruit Davrin, the Grey Warden companion.