Temple Erector

When Temple Erector enters the battlefield, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle your library. If Temple Erector is green, instead you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle your library.
Manashift {5}{g}{g} (You may cast this spell for its manashift cost. If you do, it becomes green and loses all other colors.)