Macron, Synthwave High Lord

When this Macron 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.