Poseidra Abyss, the Atlantean Dragon Lord (Quarter Century Secret Rare) [ROTA-EN043] Quarter Century Secret Rare BT18-052 each creature you control with

each creature you control with power 4 or greater gets +1/+1 and gains trample until end of turn

' Or 'goodbye

At the beginning of your end step

Whenever Grave Titan enters the battlefield or attacks

Poseidra Abyss, the Atlantean Dragon Lord (Quarter Century Secret Rare) [ROTA-EN043] Quarter Century Secret Rare BT18-052 each creature you control withSet: 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