Goldd, Wu-Lord of Dark World (UTR) (EEN-EN024) - Elemental Energy 1st Edition Number_DL11-EN005 You can only use this

You can only use this effect of "Gorgon

to return all cards on the field to their owner's Deck(s)

if possible detach 1 Xyz Material from a monster your opponent control and attach it to the Summoned monster as an Xyz Material

For every card that is removed by this effect

Goldd, Wu-Lord of Dark World (UTR) (EEN-EN024) - Elemental Energy 1st Edition Number_DL11-EN005 You can only use thisTypeFiend Effect Monster AttributeDARK Level Rank5 ATK DEF2300 1400 Card TextIf this card is discarded from the hand to the Graveyard by a card effect, Special Summon this card to your side of the field. If this card is discarded from the hand to the Graveyard by your opponent's card effect, you can select up to 2 cards on your opponent's side of the field and destroy them.