Card Rules: Rulings powered by The Netrep API. Discarding 1 card from your hand is a cost. This card targets.The target of 'Dark Core' is selected at activation of 'Dark Core'. If 'Ring of Destruction' is chained to 'Dark Core' , and destroys the monster targeted by 'Dark Core' then the effect of 'Dark Core' disappears. Passcode: 70231910 Set: Structure Deck: The Dark Emperor Card Number: SDDE-EN023 Rarity: Common Attribute: Spell Card Text: Discard 1 card. Remove from play 1 face-up monster. Card Type: Normal Spell Name: Dark Core Edition: Unlimited