Twin-Headed Thunder Dragon [DB2-EN069] Common Psychic[-30] then apply this effect on

then apply this effect on 1 of those monsters based on the result

Set: Number Hunters Card type: Effect Monster Rarity: Super Rare Attack: 1000 Defense: 2000 You can Special Summon this card (from your hand) by Tributing 1 face-up Xyz Monster you control

Set: POP Series 1 Type: Darkness Rarity: Uncommon Retreat cost: Colorless

You can Tribute this card to Special Summon 1 'Blue-Eyes White Dragon' from your hand or your Deck

If this card is sent from the field to the Graveyard: You can add 1 Union monster from your Deck to your hand

Twin-Headed Thunder Dragon [DB2-EN069] Common Psychic[-30] then apply this effect onSet: Dark Beginning 2 Card type: Fusion Monster Rarity: Common Attack: 2800 Defense: 2100 "Thunder Dragon" + "Thunder Dragon"