Gravekeeper's Servant

 For some reason, the crosses in this card's TCG artwork were not edited out in its initial release, making it one of the few cards to slip past censorship.

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It did however, have the crosses removed upon its reprint in Dark Legends.

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If one looks closely at this card's artwork, the demon in the picture is uncensored in all versions, still having horns (albeit small) and a spade tail.

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OCG Rulings

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While the effect of "Gravekeeper's Servant" is active, your opponent cannot attack without sending a card from the top of his Deck to the Graveyard.: While "Gravekeeper's Servant" and "Macro Cosmos" or "Dimensional Fisuure" are active, can the opponent declare an attack?
If the effect of "Macro Cosmos" or "Banisher of the Light" is active, then your opponent cannot send a card from the Deck to the Graveyard, so he cannot declare an attack.
If the effect of "Dimensional Fissure" is active, then it is unknown whether or not the top card of the opponent's Deck is a Monster Card, so your opponent cannot declare an attack.
If the effects of both "Dimensional Fissure" and "Convulsion of Nature

Previously Official Rulings

If you have 2 of this card on the field, their effects are cumulative.

If your opponent has no cards left in his/her Deck, he/she cannot declare an attack while this card is on your side of the field.

Mentions in Other Rulings

Asura Priest: When cards like "Gravekeeper's Servant" or "Toll" are active on the field, you must pay each time "Asura Priest" attacks.

Deepsea Warrior: . If your opponent has "Gravekeeper's Servant", you do not send a card from the top of your Deck to your Graveyard.

Dimensional Fissure: If you also have "Gravekeeper's Servant" active on the field, your opponent cannot declare an attack.

Macro Cosmos: If you also have "Gravekeeper's Servant" active on the field, your opponent cannot declare an attack.

Necrovalley: If "Necrovalley" is active and you Special Summon the Spell Card "Gravekeeper's Servant" with "Magical Hats", its ATK and DEF will be 500.

Silent Swordsman LV5: Just like "The Legendary Fisherman" and other monsters that are unaffected by Spell Cards, "Silent Swordsman LV5" can attack normally if your opponent has "Swords of Revealing Light" on the field, and its controller is unaffected by effects like "Toll" and "Gravekeeper's Servant" when "Silent Swordsman LV5" attacks.

The Legendary Fisherman: . If your opponent has "Gravekeeper's Servant", you do not send a card from the top of your Deck to your Graveyard.