Laval Stennon [HA06-EN021] Secret Rare Value Boxes while it remains on the

while it remains on the field all of your opponent's monsters lose 300 ATK

Destroy 1 monster with the highest ATK among your opponent's Attack Position monsters

The effect of "Mystic Piper" can only be activated once per turn

When an opponent's monster declares an attack while this card is in your Graveyard and you have no cards in your hand or field: You can Special Summon this card

except "Mermail Abysslinde"

Laval Stennon [HA06-EN021] Secret Rare Value Boxes while it remains on theSet: Hidden Arsenal 6: Omega Xyz Card type: Synchro Effect Monster Rarity: Secret Rare Attack: 2700 Defense: 1800 1 Tuner + 1 or more non Tuner FIRE monsters When this card is Synchro Summoned: Send 1 card from your hand to the Graveyard. During either player's turn, when this card is targeted by a card effect: You can banish 1 "Laval" monster from your Graveyard; negate the activation, and if you do, destroy the targeting card.