为 枉直狱卒格伦佐 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 Grenzo enters and at the beginning of your upkeep, heist target opponent's library.
Once each turn, you may pay rather than pay the mana cost for a spell you cast that you don't own with mana value 3 or less.
