Urza, Lord High Artificer (Retro) [Dominaria Remastered]

Cost: 2 U U When Urza, Lord High Artificer enters the battlefield, create a 0/0 colorless Construct artifact creature token with "This creature gets 1/ 1 for each artifact you control."
Tap an untapped artifact you control: Add U.
5 : Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.