Tomb of the Pharaoh (SBLS-ENS05) - Speed Duel: Arena of Lost Souls 1st Edition

Skill activation:
At the start of the Duel, place this card in your Field Zone and flip it over.
Effect:
This card's name is always treated as "Necrovalley".
All "Gravekeeper's" monsters on the field gain 200 ATK/DEF.