You can only control 1 "Gravekeeper's Chief". Cards in your Graveyard are unaffected by "Necrovalley". When this card is Tribute Summoned, you can select 1 "Gravekeeper's" monster from your Graveyard and Special Summon it.
NM-Mint 1st Edition - $0.50
NM-Mint 1st Edition Non English - $0.50
Lightly Played 1st Edition - $0.50
Lightly Played 1st Edition Non English - $0.50
Moderately Played 1st Edition - $0.40
Moderately Played 1st Edition Non English - $0.40
Heavily Played 1st Edition - $0.40
Heavily Played 1st Edition Non English - $0.40
Damaged 1st Edition - $0.30
Damaged 1st Edition Non English - $0.30