Poseidra Abyss, the Atlantean Dragon Lord (Secret Rare)

Poseidra Abyss, the Atlantean Dragon Lord (Secret Rare) came out in August 2025; we leave the first weeks out of this story, because early prices are set before real supply exists. Over the past twelve months it moved −17.1%, trading between $0.18 and $0.38. The current price is in the middle of that range. Listings currently start at $0.06; over the last 30 days the market price averaged $0.29.

3 Level 7 monsters
Once per turn, you can also Xyz Summon "Poseidra Abyss, the Atlantean Dragon Lord" by using 1 "Atlantean" or "Mermail" Xyz Monster you control. (Transfer its materials to this card.) Once per turn: You can detach 2 materials from this card, then send 1 WATER monster from your hand or Deck to the GY; return up to 3 cards your opponent controls to the hand. If this Xyz Summoned card is sent to the GY: You can discard 1 card to the GY; Special Summon 3 Level 3 or lower Fish, Sea Serpent, and/or Aqua monsters from your hand and/or GY.