The Forgotten series are a group of DARK Zombie-Type Monsters that are Zombie Counterparts of Monsters in the OCG that were never reprinted into the TCG (at the time of the creation of this series), or retrained versions of existing Zombie-Types in this same category. Some of them are Normal Monsters, some of them focus on bringing themselves or others back from the grave for revenge, and others have effects that activate when they are resurrected.

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