Latios (10/20) (Blister Exclusive) [Black & White: Dragon Vault] Crossroads of Chaos You can only activate this

You can only activate this effect during your Main Phase or your opponent's Battle Phase

Fusion Material Monsters that are listed on a Fusion Monster Card that includes 'Elemental Hero' in its card name

Set: Duel Terminal 7 Card type: Xyz/Effect Monster Rarity: Ultra Rare Attack: 2350 Defense: 1350 2 Level 4 "lswarm" monsters Once per turn: You can detach 1 Xyz Material from this card to target 1 face-up monster your opponent controls

during your opponent's Standby Phase: You can inflict 300 damage to your opponent for each card your opponent controls

Latios (10/20) (Blister Exclusive) [Black & White: Dragon Vault] Crossroads of Chaos You can only activate thisSet: Black & White: Dragon Vault Type: Dragon Rarity: Promo Retreat cost: Colorless