Remiel, Dwemerologist

Party Member. When Remiel enters, create a 1/1 artifact creature token with “Dwemer Construct. This token gets +1/+1 for each artifact you control.”

Tap an untapped artifact you control: Add {w/u}.

{5}: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.
(Based on Urza, Lord High Artificer.)