为 水中投毒 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！
Choose one —
• All creatures get −1/-1 until end of turn.
• Target player reveals their hand. You choose an artifact or creature card from it. That player discards that card.
