1 DARK Tuner + 1 or more non-Tuner Zombie monsters
This card cannot be Synchro Summoned except by Dark Synchro Summon (subtract the Level of the Tuner from the Level of the non-Tuner Zombie monsters). If this card is Special Summoned: You can activate 1 “Zombie World” directly from your Deck or GY. While “Zombie World” is on the field, apply the following effects: All monsters your opponent controls lose 500 ATK/DEF. If a monster(s) would be Tributed or banished, banish 1 Zombie monster from either GY instead. Once per turn, if your opponent Special Summons a monster(s): You can banish 1 Zombie monster from your GY; destroy 1 of those monsters and inflict 500 damage to your opponent. If this face-up card leaves the field because of your opponent's card: You can Special Summon 1 Level 5 or lower Zombie monster from your Deck or GY, ignoring its Summoning conditions.