As Call to Arms enters the battlefield, choose a color and an opponent. White creatures get +1/+1 as long as the chosen color is the most common color among nontoken permanents the chosen player controls but isn't tied for most common. When the chosen color isn't the most common color among nontoken permanents the chosen player controls or is tied for most common, sacrifice Call to Arms.
Divine Intervention enters the battlefield with two intervention counters on it. At the beginning of your upkeep, remove an intervention counter from Divine Intervention. When you remove the last intervention counter from Divine Intervention, the game is a draw.
At the beginning of your upkeep, if an opponent controls more lands than you, you may search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle your library.