Merchant's Dockhand
Aether Revolt — rare
Artifact Creature — Construct
Merchant's Dockhand rulings:
2017-02-09: If the value of X is greater than or equal to the number of cards in your library, you can order your library as you wish.
2017-02-09: If the value of X is 0, you don’t look at or move any cards.
2017-02-09: Merchant’s Dockhand is tapped to pay the cost. It can’t also be one of the X untapped artifacts you tap.