{3}{U}, {T}, Tap X untapped artifacts you control: Look at the top X cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.
If the value of X is 0, you don’t look at or move any cards.
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.
Merchant’s Dockhand is tapped to pay the {T} cost. It can’t also be one of the X untapped artifacts you tap.