为 Selvala, Heart of the Wilds 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！
Whenever another creature enters, its controller may draw a card if its power is greater than each other creature's power.
, : Add X mana in any combination of colors, where X is the greatest power among creatures you control.
