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 treasure-hunting quests, as you scour a ruined castle in the Rivain Coast region, looking for seals to unlock some loot. It's quite easy to miss if you haven't explored the region thoroughly,

As is expected from Dragon Age, there are romance options galore in Dragon Age: The Veilguard — and the fan discussion on which non-player character to romance began months before the game even came out.