Arapawa Pathfinder

{r/g}, {t}, Sacrifice Arapawa Pathfinder:
Search your library for a basic land card, put it onto the battlefield tapped, then shuffle your library. Target Goat you control gains Mountainwalk until end of turn.
He set out to find new pastures for his brethren to graze. The path he walked became clear, but he was never seen or heard from again.