The Glorious Dagger is a ship reclaimed from the Meritech Wars and purchased by the Vrain Dynasty. After Rogue Trader Exodus Vrain disappeared over three hundred years ago his Warrant of Trade was eventually annulled, and when the D'Ralier Dynasty discovered it, dormant, in orbit around a world ruled by an alien god they rightously reclaimed it in the name of their family and the Emperor.
It is a Meritech Shrike-class Raider.