为 沉势珍珠 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 this artifact enters, conjure a card named Ponder into your hand.
Whenever one or more Merfolk you control deal combat damage to a player, sacrifice this artifact. If you do, conjure a card named Flooded Strand into your hand.
