Doom Virus Dragon (Purple) [DLCS-EN055] Ultra Rare Booster Packs you can select 1 Synchro

you can select 1 Synchro Monster your opponent controls

when a card or effect is activated

Set: Diamond & Pearl: Majestic Dawn Type: Lightning Rarity: Uncommon

Set: Sword & Shield: Base Set Type: Lightning Rarity: Ultra Rare Retreat cost: 0

remove all Spell Counters from it at the end of the Battle Phase

Doom Virus Dragon (Purple) [DLCS-EN055] Ultra Rare Booster Packs you can select 1 SynchroSet: Dragons of Legend: The Complete Series 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". If this card is Special Summoned: Look at 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 or more ATK.