Banjo, Courier of Yagi

Flash
{1}{g},{t}, Put a courier counter on Banjo, Courier
of Yagi: Search your library for an Artifact with
a converted mana cost equal to the number of
courier counters on Banjo, Courier of Yagi, put
it onto the battlefield, then shuffle your library.
"Oh Banjo? They're the best courier I know!"