Key of Hope (NGL/S58-E074 U) [No Game No Life]

If you do not have a character with "Sora" or "Shiro" in its card name, this card cannot be played from your hand. Put the top 2 cards of your deck into your waiting room, choose 1 level X or lower character in your waiting room, and return it to your hand. X is equal to the total level of the revealed cards. (Climax are regarded as level 0)