Poseidra Abyss, the Atlantean Dragon Lord (Quarter Century Secret Rare) (ROTA-EN043) - Rage of the Abyss 1st Edition Condition:Moderatly Played including a WATER monster

including a WATER monster

this card and 1 Dragon or DARK monster

the Magistus Moon Maiden" once per turn

If it is your turn and you activate it

Poseidra Abyss, the Atlantean Dragon Lord (Quarter Century Secret Rare) (ROTA-EN043) - Rage of the Abyss 1st Edition Condition:Moderatly Played including a WATER monsterTypeSea Serpent Xyz Effect Monster AttributeWATER ATK DEF3000 1800 Card Text3 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