Father Time, Eternity's Keeper

When Father Time, Eternity's Keeper enters the battlefield, create a 0/0 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 it's mana cost.