为 Living Brain, Mechanical Marvel 寻找最佳的标准套牌，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 combat on your turn, target non−Equipment artifact you control becomes an artifact creature with base power and toughness 3/3 until end of turn. Untap it.
