Plant a Sapling // Fully-Grown Treefolk

Search your library for a basic land card, reveal it, put it into your hand, then shuffle this spell into its owner's library transformed. (For playtesting purposes, put it into its sleeve upside down.) // (You can't cast this face unless it's been transformed by the front face.) Fully-Grown Treefolk's power and toughness are each equal to the number of lands you control.