为 金牙塔西格 寻找最佳的先驱套牌，包括其胜率、热度，以及该牌在万智牌：竞技场中的合法赛制！
Delve (Each card you exile from your graveyard while casting this spell pays for .)
: Mill two cards, then return a nonland card of an opponent's choice from your graveyard to your hand.
