Call to Arms

As this enchantment enters, 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 this enchantment.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o562h2ngppb1h3gda7cjw.