This deck aims to fill the graveyard with dark monsters for The Dark Creator, a boss whose effect can banish and summon dark monsters from your graveyard.
The Strategy
The opening play is to send Cross Porter from the deck to the graveyard with Armageddon Knight, Dark Grepher and Foolish Burial, which activates Cross Porter's effect to search for a Neo-Spacian. The Neo-Spacian you searched for could be used as fodder for cards like Convert Contact, Plaguespreader Zombie, or Brionac, Dragon of the Ice Barrier. If everything goes as planned, then you will overwhelm the opponent with resources by the time The Dark Creator is summoned.
Other Bosses
Dark Armed Dragon can easily clear boards with targeted destruction.
Dark Nephthys has a mandatory effect that destroys a spell or trap whenever she's special summoned. The Dark Creator and Call of the Haunted can trigger her effect.
Some Tips
Reinforcement of the Army can search for Neo-Spacian Aqua Dolphin. It's pretty handy if you start with Convert Contact.
Junk Synchron + Cross Porter + a level 4 monster can make Mist Wurm.
The Dark Creator can special summon Barrier Statue of the Abyss from your graveyard!