Benny, Master Artificer

When Benny, Master Artificer enters the
battlefield, create a 0/0 construct artifact creature
token that has "This has +1/+1 for each Artifact
you control."
Tap an untapped Artifact you control: Add
{1} to your mana pool.
{5}: Shuffle you deck, then exile the top card.
Until end of turn, you may cast that card
without paying its mana cost.