Barian Battlemorph! Sargasso, the Dark Realm

Spell Field

Each time a monster is Xyz Summoned: The Summoning player takes 500 damage. During each player's End Phase, the turn player takes 500 damage if they control a face-up Xyz Monster.

Spell Quick

When a Spell effect that would inflict damage to you is activated: You take no damage from that effect. While this card is in your Graveyard, you take no damage from the effect of "Sargasso the D.D. Battlefield". When this Set card is sent to the Graveyard: You can add 1 "Sargasso the D.D. Battlefield" from your Deck to your hand.

LIGHT 4

Once per turn: You can send 1 Spell Card from your hand to the Graveyard; Special Summon 1 "Star Seraph" monster from your hand.