Use those creatures to buff your board, or utilize creatures that get stronger based on the number of creatures you control to quickly defeat your opponent
Other than that, they dont have much to say
Were still going to cover them here (loosely ranked from worst to best) so you know the best playable options available, but given the opportunity, leaning on another color and/or mana rocks when possible will usually yield better results outside of specific strategies
If a card refers to your devotion to a color, it means the number of mana symbols of that color among permanents you control
And if an opponent destroys it without removing Sauron, it'll just come back again
Cast Black Lotus, something cheap like a Duress, and one free spell like Manamorphose or Gitaxian Probe