Card Errata:Necrovalley

Necrovalley (Pharaonic Guardian, Duelist League 3, Dark Revelation vol.1) 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.