Preponderant Pearl is a uncommon Kindred Artifact — Merfolk card from Alchemy: Lorwyn Eclipsed (YECL), collector number 5.
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.