Continuous Trap
While a monster(s) with "Gravekeeper's" in its name "Necrovalley" are both in play, monsters your opponent has in play lose 500 ATK and DEF. Once per turn, during the Main Phase, if you have no card in your Field Zone, you can play 1 "Necrovalley" directly from your hand or Graveyard to your field. If this card you have in play is destroyed by an opponent's effect and sent to your Graveyard, you can Set 1 Spell or Trap Card with "Necrovalley" from your Deck to your field, other than "Necrovalley Temple".
COMMON