为 Gwen Stacy 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！
When Nia enters, exile the top card of your library. You may play that card for as long as you control this creature.
: Transform Nia. Activate only as a sorcery.
