为 人鱼隧道向导 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 Merfolk Tunnel−Guide enters, you get a three-time boon with "Whenever one or more Merfolk enter under your control, target Merfolk creature you control explores."
