yugioh realm of the sea emperor structure deck Yu-Gi-Oh! - This cards name is treated as Umi Poseidra Value Box Structure Deck:

Wild Hope search for Superstar

If this card is destroyed by battle or card effect and sent to the GY: You can Special Summon 1 Noble Knight Xyz Monster from your Extra Deck, except Sacred Noble Knight of King Custennin, and if you do, attach this card from the GY to that monster as material

If the words on the stamp are vertical, you should also avoid such a card

(1) You can discard this card

Special Summon all excavated Level 4 or lower monsters in face-down Defense Position, also send the remaining cards to the GY.ATK: 800 DEF: 700

They first met during Heartland's invasion when Aster heard that Yusho was spreading nonsense about Dueling with smiles