What is Helvault?

Another 2 week adventure added to http://deckdueltales.blogspot.ca/ The thing about this adventure is the card featured itself was never really part of the setting. I never once saw a single person play this card. I never once knew what it could be used for other than protecting your own creatures. Unfortunately, that would not help in a competitive game. Yet this card had a huge impact on the greater story. I really wanted to see what players would do if I brought this card to the forefront of this Deck Duel Tales.