Poseidra, the Storming Atlantean (Quarter Century Secret Rare)

Poseidra, the Storming Atlantean (Quarter Century Secret Rare) came out in January 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 −32.5%, trading between $32.18 and $51.05. The current price is near the bottom of that range. Listings currently start at $32.99; over the last 30 days the market price averaged $34.80.

While you control a monster, except "Poseidra, the Storming Atlantean", your opponent's monsters cannot target this card for attacks. You can only use each of the following effects of "Poseidra, the Storming Atlantean" once per turn. You can send 1 other WATER monster from your hand or face-up field to the GY; Special Summon this card from your hand. If this card is Normal or Special Summoned: You can send 1 "Atlantean" or "Mermail" monster from your Deck to the GY, then target 1 card your opponent controls; return it to the hand.