Dowsing Stag

{g} Sacrifice Dowsing Stag: Search your library
for a basic land card, put it onto the battlefield
tapped, then shuffle your library.
When Dowsing Stag dies but was not sacrificed,
look at the top five cards of your library. You
may reveal a land card from among them and
put it into your hand. Put the rest on the bottom
of your library in any order.
"The real trick of it of killing the stag just when it has
has found what you need."