Fabled Passage

{t}, Sacrifice Fabled Passage: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control four or more lands, untap that land.
"The sound is coming from somewhere around
here. Wow! Here it is! There's a gap, and it looks like we can fit through! C'mon! Let's go have a
look!"-Bianca