Elemental Hero Core [JUMP-EN071] Ultra Rare Dinosaur You can only use this

You can only use this effect of "Golden Castle of Stromberg" once per turn

It gains 400 ATK/DEF

Set: Duel Power Card type: Effect Monster Rarity: Ultra Rare Attack: 2000 Defense: 0 You can send 1 other LIGHT monster from your hand to the GY

check your opponent's hand

using Materials including this card you control

Elemental Hero Core [JUMP-EN071] Ultra Rare Dinosaur You can only use thisSet: Shonen Jump Magazine Promos Card type: Fusion Effect Monster Rarity: Ultra Rare Attack: 2700 Defense: 2200 3 "Elemental Hero" monsters Must be Fusion Summoned and cannot be Special Summoned by other ways. Once per turn, when this card is targeted for an attack: You can make this card's ATK become double its current ATK until the end of the Damage Step. At the end of the Battle Phase, if this card attacked or was attacked: You can target 1 monster