The Cap allowed you to remove three cards from your opponents deck and the Mask allowed you to give your opponent a new hand, all land, no land, all things too expensive for them to cast, its your call
On top of that, its also an Angel and a Wizard, which opens the doors for some interesting typal synergies if you want to dabble in those
I feel okay about the decks, as Final Fantasy is doing nicely in basically every arena and the collectors are still going wild, but the Dragonscales sting
Cards with the ability word "descend N" have abilities that care if you have at least N permanent cards in your graveyard
This allows you to utilize a massive amount of artifacts at a time, and get the most value out of cards like Affinity and Improvise that value large numbers of artifacts and mechanics