The basic idea is to turbo out Doomking Balerdroch/Zombie World and to support him with whatever resources you have left over--this is usually either Baronne de Fleur, Vampire Voivode/Domination, or Apollousa. Your extra is pretty much a toolbox for remaining cards or going second. You
really want to see Uni-Zombie, Vampire Ghost, and Vampire's Domain in your opening hand. Vampire Ghost+most Vampire cards typically means you can end on Beatrice to send Necroworld Banshee and Doomking Balerdroch to the gy. The deck has a lot of unique interactions-Vampire Sucker+Ghost in the grave can be a quick effect 2 tribute on your opponents turn, and Sucker draws you a card every time Doomking revives. Rivalry+Zombie World locks your opponent out of summoning.