If you can manage to complete a Dungeon, you can shut down one of your opponents large creatures by turning it into a 1/1 Bird
Each Collector Booster contains 15 Magic: The Gathering cards and 1 traditional foil double-sided token, with a combination of 5 Rares and/or Mythic Rares, 25 Uncommons, 47 Commons, and 1 Land card
Oh, uh, you wanted a review on Radha, Heart of Keld
Soul Warden and its sisters make easily repeatable lifegain triggers in a multiplayer game, and you can squeeze extra value out of that lifegain with Well of Lost Dreams and Angel of Vitality
If you're opening Collector Boosters, your chances increase significantly, as they contain a minimum of three Mystical Archive cards per pack
and you can also put it on Mirage Mirror for future copying