Ayr, Tezzeret's Pupil

Hexproof, vigilance
When Ayr enters the battlefield, exile up to
three artifacts you control until Ayr leaves the battlefield. Put a +1/+1 counter on Ayr for each artifact exiled this way.
{w}{u}{b}, {t}: For each +1/+1 counter on Ayr, reveal the top card of your library. Put all artifact cards into your hand and the rest
into your graveyard.