Relic Hunter

When Relic Hunter enters the battlefield, it
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 this creature, then put the
card back or put it into your graveyard.)
When Relic Hunter dies, sacrifice a land and
search your library for a land card that can
Transform into an artifact., reveal it, put it into
your hand, then shuffle your library.