Déjà, mettons les choses au clair :
Nom : Vampire lord
Niveau : 5
Attribut : Dark
Type : Zombie
ATK : 2000
DEF : 1500
Effet : Each time this card inflicts Battle Damage to your opponent, declare 1 card type (Monster, Spell, or Trap). Your opponent selects 1 card of that type from his/her Deck and sends it to the Graveyard. Also, when this card is destroyed by your opponent's card effect, it is Special Summoned to the field during your next Standby Phase.
Nom : Necrovalley
Type : Terrain
Effet : As long as this card remains on the field, negate the effects of Spell, Trap, and Monster Cards that affect a card(s) in the Graveyard, and neither player can remove cards in the Graveyards from play. Also, as long as this card remains on the field, increase the ATK and DEF of all monsters that include "Gravekeeper's" in their card name by 500 points.
Considérant que tous les effets qui concernent le cimetière de près comme de loin sont annulés, ton
Vampire lord ne peut revenir du cimetière.