Destroy

Destroy refers to an act that results in sending a card to the Graveyard or Banishing a target, happen due to:
 * Card effects that uses the term "destroy" (like "Exiled Force", "Horn of Heaven").
 * Cost that uses the term "destroy" (like "Messenger of Peace").
 * Game mechanics, due to:
 * Monsters battling. Monsters conduct on battle will be destroyed during damage calculation if:
 * Their ATK is equal to or less than the opposite monster's ATK, if it's ATK vs. ATK battle.
 * Their DEF is less than the attacking monster's ATK, if it's ATK vs. DEF battle.
 * Field Spell Card rules. Active Field Spell Cards will be destroyed after resolving another Field Spell Card. Also, a played Field Spell Card will be destroyed as well if its controller would play another Field Spell Card.
 * Equip Card rules. Equipped cards will be destroyed if their target isn't face-up on the Monster Card Zones, or has become incorrect target. Also, they will be destroyed if the effect that make them Equip Card is disappear (like negating the effect of "Morphtronic Vacuumen").
 * Existence restrictions. Cards on the field will be destroyed if an effect doesn't allow them to exist on the field (like flipping "Earthbound Immortal Aslla piscu" face-up by card effect while you control another on).
 * Occupied Card Zone. Cards your opponent control will be destroyed if the control is switch while you have no empty Card Zone for them (like using the effect of "Informer Spider" while you control 5 monsters).

Usually, cards in the Main Deck and Banished Zone cannot be destroyed.

Not all cards that send cards from the field to the Graveyard destroy them; cards like "Dark End Dragon", "Ninjitsu Art of Super-Transformation", "Number 50: Blackship of Corn", and one of the effects of "Number 7: Lucky Straight" send cards from the field to the Graveyard, but they do not destroy the cards, since they don't include the word "destroy" in the text, so these effects cannot be negated by effects like "Stardust Dragon", and other similar effects.