Valhalla, Hall of the Fallen [SDLS-EN024] Common Sea Serpent then destroy 1 face-up monster

then destroy 1 face-up monster your opponent controls with ATK less than or equal to the target's ATK

This card gains 500 ATK for each Dragon monster you control

When an opponent's monster declares a direct attack while you control no cards and this card is in your Graveyard: Special Summon this card in Defense Position as an Effect Monster (Warrior-Type/DARK/Level 4/ATK 300/DEF 600)

If it is destroyed

then if it was a monster

Valhalla, Hall of the Fallen [SDLS-EN024] Common Sea Serpent then destroy 1 face-up monsterSet: 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.