Effect
Zombie monsters gain 500 ATK during damage calculation only. Once per turn, when a card(s) is sent from your opponent's Deck to the GY: Target 1 card on the field; send 1 DARK "Vampire" monster from your hand or Deck to the GY, and if you do, destroy that target.
The effect "Undead-Type monsters on the field gain 500 ATK only during damage calculation" is an effect that does not start a Chain Link.
The effect "Once per turn, when a card(s) is sent from your opponent's Deck to the Graveyard: You can send 1 DARK "Vampire" monster from your hand or Deck to the Graveyard, then target 1 card on the field; destroy it" is an effect that starts a Chain Link.
The effect "send 1 DARK "Vampire" monster from your hand or Deck to the Graveyard, then target 1 card on the field; destroy it" is a mandatory effect that activates when a card(s) is sent from your opponent's Deck to the Graveyard. (It also activates during the Damage Step.)
The effect "send 1 DARK "Vampire" monster from your hand or Deck to the Graveyard, then target 1 card on the field; destroy it" targets 1 card on either player's field.
The action of "sending 1 DARK "Vampire" monster from your hand or Deck to the Graveyard" and the action of "targeting 1 card on the field and destroying it" are treated as occurring simultaneously.
Continue with related public research
From this rulings page you can jump back into card data, set archives, tournament decks, banlist checks, and market movers.
Card database
Search Yu-Gi-Oh! cards, archetypes, stats, and printings.
Set archive
Navigate booster sets and inspect all cards in each release.
Tournament decks
Browse competitive decklists, player finishes, and archetype trends.
Banlist status
Check the current status of Yu-Gi-Oh! cards on the banlist.
Market movers
Track the top Yu-Gi-Oh! price gainers and momentum cards.