为 兽群监护使 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！
: Add one mana of any one color. Spend this mana only to cast a creature spell.
Whenever you cast a creature spell that doesn't share a creature type with a creature card in your library, draw a card.
