Gravekeeper's Chief

Edison Card Text
You can only control 1 "Gravekeeper's Chief" at a time. Your Graveyard is unaffected by "Necrovalley". When this card is Tribute Summoned, you can Special Summon 1 "Gravekeeper's" monster from your Graveyard.
Champion Pack: Game Three • 2007-05-15
Targets
Note: the last effect
No Damage Step effect
Banlist • Unlimited
Rulings
edisonformat.net
●You can use the effect of Gravekeeper’s Chief to Special Summon the same monster you Tributed to Summon Gravekeeper’s Chief.
●If you Set, Flip Summon, or Special Summon Gravekeeper’s Chief, its Special Summoning effect is not activated.
●If you have Gravekeeper’s Chief and Necrovalley on the field, you can use Monster Reborn, Premature Burial, Call of the Haunted, etc. to revive monsters from your GY. Also, if you have Gravekeeper's Chief on the field, your opponent can use Monster Reborn on monsters in your GY.
●You can't activate The Shallow Grave while Necrovalley is active, even if you control Gravekeeper’s Chief, because your opponent can't Special Summon a monster from his GY.
●If Necrovalley is on the field, and both players control a Gravekeeper’s Chief, then the Flip Effect of Fiber Jar can resolve normally, but if neither, or only 1, player has Gravekeeper’s Chief, then the Flip Effect of Fiber Jar disappears.
edisonformat.com
You can use the effect of "Gravekeeper’s Chief" to Special Summon the same monster you Tributed to Summon "Gravekeeper’s Chief".
If you Set, Flip Summon, or Special Summon "Gravekeeper’s Chief", its Special Summoning effect is not activated.
If you have "Gravekeeper’s Chief" and "Necrovalley" on the field, you can use "Monster Reborn", "Premature Burial", "Call of the Haunted", etc. to revive monsters from your Graveyard. Also, if you have "Gravekeeper's Chief" on the field, your opponent can use "Monster Reborn" on monsters in your Graveyard.
You cannot activate "The Shallow Grave" while "Necrovalley" is active, even if you control "Gravekeeper’s Chief", because your opponent cannot Special Summon a monster from his Graveyard.
If "Necrovalley" is on the field, and both players control a "Gravekeeper’s Chief", then the Flip Effect of "Fiber Jar" can resolve normally, but if neither, or only 1, player has "Gravekeeper’s Chief", then the Flip Effect of "Fiber Jar" disappears.
GRAVEKEEPER’S DESCENDANT
(1) You can Tribute 1 face-up "Gravekeeper's" monster you control, except this card, to destroy 1 card your opponent controls.
The (1) Ignition Effect targets 1 card your opponent controls.
If you gain control of the target, it is not destroyed.
The target is destroyed even if it flipped face-down (by "Book of Moon") or it is chained.
Tributing a face-up "Gravekeeper's" monster is a cost.
If "Soul Exchange" targets your opponent's face-up "Gravekeeper's" monster, you can Tribute it.