Special Summon "The Dark Creator" when you have 5 or more DARK monsters in your Graveyard.

Then banish 1 DARK monster from your Graveyard to Special Summon another DARK monster.

To finish things up, send 1 card from your hand to the Graveyard to activate "D.D.R. - Different Dimension Reincarnation" and Special Summon the monster you just banished with the effect of "The Dark Creator" This way, you will have 3 monsters on the field for an all-out attack!