为 绿洲仪式师 寻找最佳的史迹套牌，包括其胜率、热度，以及该牌在万智牌：竞技场中的合法赛制！
: Add one mana of any color.
, Exert this creature: Add two mana of any one color. (An exerted creature won't untap during your next untap step.)
