Doom Virus Dragon [DRL3-EN057] Ultra Rare Pendulum/Normal Monster Set: Hidden Summoners Card type:

Set: Hidden Summoners Card type: Continuous Trap Rarity: Super Rare All "Nephthys" monsters you control gain 300 ATK

Set: Dark Beginning 1 Card type: Continuous Trap Rarity: Common Attack: 0 Defense: 0 Halve the ATK of all your opponent's attacking monsters

Set: The Infinity Chasers Card type: Normal Spell Rarity: Super Rare Target the 1 Xyz Monster you control with the highest Rank (your choice

Set: Battles of Legend: Relentless Revenge Card type: Effect Monster Rarity: Ultra Rare Attack: 0 Defense: 0 Cannot be Special Summoned from the Deck

then if it was a monster

Doom Virus Dragon [DRL3-EN057] Ultra Rare Pendulum/Normal Monster Set: Hidden Summoners Card type:Set: Dragons of Legend: Unleashed Card type: Fusion Effect Monster Rarity: Ultra Rare Attack: 1900 Defense: 1500 Must be Special Summoned with "The Fang of Critias", using "Crush Card Virus", and cannot be Special Summoned by other ways. If this card is Special Summoned: Check your opponent's hand, all monsters they control, and all cards they draw until the end of their 3rd turn after this effect's activation, and destroy all those monsters with 1500