Poseidra Abyss, the Atlantean Dragon Lord (Quarter Century Secret Rare) [ROTA-EN043] Quarter Century Secret Rare BT18-052 At the beginning of your

At the beginning of your end step

Activate only once each turn

Whenever Grave Titan enters the battlefield or attacks

(An exerted permanent won't untap during your next untap step

Set: Secret Lair Drop Series Type: Creature — Vampire Cleric Rarity: Mythic Cost: {2}{B}{B} Flying

Poseidra Abyss, the Atlantean Dragon Lord (Quarter Century Secret Rare) [ROTA-EN043] Quarter Century Secret Rare BT18-052 At the beginning of yourSet: Rage of the Abyss Card type: Xyz Effect Monster Rarity: Quarter Century Secret Rare Attack: 3000 Defense: 1800 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