Gravekeeper's Assailant is a Common Effect Monster card from Yu-Gi-Oh! (Dark Revelation Volume 1, DR1). Current market price: $0.11.
Common
Dark Revelation Volume 1 (DR1)
Card Text
When this card declares an attack while "Necrovalley" is on the field: You can target 1 face-up monster your opponent controls; change that target's battle position.
