Adventurous Archeologist

Whenever a Cave you control enters, Adventurous Archeologist explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on the exploring creature, then put the card back or put it into your graveyard.)

{u}{b}{g}, {ut}, Exile a land card from your graveyard: Search your library for an artifact card with mana value X or less, where X is the number of land cards in your graveyard, put it onto the battlefield, then shuffle.