为 永恒巨著 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！
, : Conjure a random card from Tome of the Infinite's spellbook into your hand. It perpetually gains "You may spend mana as though it were mana of any color to cast this spell."
