Desert Reign Rider

When Desert Reign Rider enters the battlefield,
search your library for up to one basic land card,
put it onto the battlefield tapped, then shuffle
your library. If you control a desert, repeat this process. You may not search your library more
than two times this way.
"Explorers are the support beams that hold up
the roof of this expedition. If they go around
dying like there's no tomorrow, we'll have
nothing.
-Frenrund, Crusader Captain