Lore 3 Level 4 DARK monsters
You can also Xyz Summon this card by using a "Number 73: Gravekeeper's Stone Guardian Monolith" and a Level 5 or higher "Gravekeeper's" monster as the Xyz Materials. (Xyz Materials attached to that monster also become Xyz Materials on this card.) This monster gains ATK equal to the number of Xyz Materials attached to this card x 500. While "Necrovalley" is face-up on the field, whenever a monster you control would be sent to the Graveyard, you attach that card to this card as an Xyz Material. This effect cannot be negated by "Necrovalley". This monster cannot attack your opponent directly.
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