When a Spell Card, Trap Card, or monster effect is activated, while both a "Gravekeeper's" monster and "Necrovalley" are on the field: Negate the activation, and if you do, destroy it. You can only activate 1 "Imperial Tombs of Necrovalley" per turn.
NM-Mint Unlimited - $1.50
Lightly Played Unlimited - $1.30
Moderately Played Unlimited - $1.20
Heavily Played Unlimited - $1.10
Damaged Unlimited - $0.80
NM-Mint 1st Edition - $2.70
Lightly Played 1st Edition - $2.40
Moderately Played 1st Edition - $2.20
Heavily Played 1st Edition - $1.90
Damaged 1st Edition - $1.40
NM-Mint Unlimited Non English - $1.50
Lightly Played Unlimited Non English - $1.30
Moderately Played Unlimited Non English - $1.20
Heavily Played Unlimited Non English - $1.10
Damaged Unlimited Non English - $0.80
NM-Mint 1st Edition Non English - $2.70
Lightly Played 1st Edition Non English - $2.40
Moderately Played 1st Edition Non English - $2.20
Heavily Played 1st Edition Non English - $1.90
Damaged 1st Edition Non English - $1.40