Valhalla, Hall of the Fallen [SDLS-EN024] Common Sea Serpent then if it was a

then if it was a monster

the Dominator of Dimensions itself

and you have a Dragon-Type monster in your Graveyard: You can Special Summon this card from your hand

this card gains 2000 ATK/DEF

Set: The Infinity Chasers Card type: Xyz/Effect Monster Rarity: Super Rare Attack: 2900 Defense: 2500 2 Level 9 monsters Once per turn: You can detach 1 material from this card

Valhalla, Hall of the Fallen [SDLS-EN024] Common Sea Serpent then if it was aSet: Structure Deck: Lost Sanctuary Card type: Continuous Spell Rarity: Common Attack: 0 Defense: 0 Once per turn, if you control no monsters, you can Special Summon 1 Fairy Type monster from your hand.