Boost Energy (87/101) [EX: Dragon Frontiers] SM47 You can only use each

You can only use each effect of “Valkyrie Erste” once per turn

Set: Duelist Pack 5: Aster Phoenix Card type: Normal Spell Rarity: Common Attack: 0 Defense: 0 Select 1 face-up monster your opponent controls

Set: Structure Deck: Lair of Darkness Card type: Field Spell Rarity: Super Rare All face-up monsters on the field become DARK

If this card in its owner's Spell & Trap Zone is destroyed by an opponent's card effect: You can add 1 "Harpie's Feather Duster" from your Deck or GY to your hand

) The original ATK of this card is equal to 1000 x the number of Fusion Material Monsters used to Special Summon it

Boost Energy (87/101) [EX: Dragon Frontiers] SM47 You can only use eachSet: EX: Dragon Frontiers Type: Energy Rarity: Uncommon