为 多美代的札记 寻找最佳的先驱套牌，包括其胜率、热度，以及该牌在万智牌：竞技场中的合法赛制！
At the beginning of your upkeep, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")
, Sacrifice three Clues: Search your library for a card, put that card into your hand, then shuffle.
