为 Owlin Historian 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！
Flying
When this creature enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
Whenever one or more cards leave your graveyard, this creature gets +1/+1 until end of turn.
