Launching the Unlock the Vault-series, this first installment sees the party search the royal crypt in the ruins of Wellsing for the fabled Shield of Ralfour - An artifact that, initially unknown to the party, also acts as one of the eight keys to break the seal on Aizendore's Vault of Tragic Treasure.
This is an incredibly deadly dungeon that will strain the limits of any party that dares to tread within. I consider this to be a challenge dungeon of sorts, and I would suggest it as a dungeon to throw at players if they ever want to run a gauntlet with new characters. This dungeons is filled to the brim with traps, puzzles, and vicious creatures. It is also quite a long dungeon - be prepared to spend at least two sessions working through the pathways of this horrifying Tomb.