The one mana ability will either tap or untap an artifact
In the mid-game, you'll continue to develop your board with Sentinels, Glissa, and Innkeeper's Talent triggers while deciding between using your map tokens and Dreadknight adventures for card advantage or removing creatures important to your opponent's strategy
With a little manipulation of the graveyard, you can get multiple uses out of Masterpiece Vault, making it a great addition to plenty of decks
Until then, Mufasa can enjoy its place at the top of most expensive Shimmering Skies cards
However, back in the day, lifegain was a big deal and that nostalgic viewing of Diamond Valley's playability contributed to it being one of the most valuable Arabian Nights cards
Whats the volume and weight of a card, and what kind of crazy stuff have people done with them