What does this card's (Rule) mean, exactly? (*This card's "This card/Digimon is also treated as having [Greymon] in its name" has been changed to "(Rule) Name: Also treated as having [Greymon].")
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Official Ruling
This is a special rule for this card that always treats it as if it also includes the [Greymon] name. This card can be chosen for text that specifies cards with [Greymon] in their names. This card can't be chosen for text that specifies cards with the name [Greymon].