Masterwork of Ingenuity [Double Masters] Nymph Dryad He used those artifacts to

He used those artifacts to quickly generate huge amounts of mana

Untap all lands you control

Sliver spells you cast have cascade

on the other hand

Set: Dark Ascension Promos Type: Sorcery Rarity: Rare Cost: {3}{B}{B}{B} Return all Zombie creature cards from your graveyard to the battlefield tapped

Masterwork of Ingenuity [Double Masters] Nymph Dryad He used those artifacts toSet: Double Masters Type: Artifact Equipment Rarity: Rare Cost: {1} You may have Masterwork of Ingenuity enter the battlefield as a copy of any Equipment on the battlefield. "The crucible yields what you have forged in your mind. You need only reach in and draw the masterwork forth." Wahara, Keeper of the Crucible