Debunk [LC5D-EN255] Secret Rare 144 Set: Wizards of the Coast:

Set: Wizards of the Coast: Black Star Promos Type: Item Rarity: Black Star Promo

The ATK of this card becomes the combined original ATK of the Tributed monsters

Set: Promotional Schemes Type: Scheme Rarity: Rare When you set this scheme in motion

If that target destroys a monster by battle and sends it to the Graveyard: Inflict damage to your opponent equal to the ATK of the destroyed monster in the Graveyard

and ponderings

Debunk [LC5D-EN255] Secret Rare 144 Set: Wizards of the Coast:Set: Legendary Collection 5D's Card type: Counter Trap Rarity: Secret Rare Attack: 0 Defense: 0 When a monster effect is activated in the hand or Graveyard: Negate the activation, and if you do, banish it.