This deck is very good at beating over a decent bit of the meta by flood gating them with the use of Zombie World, and when going first the deck can easily turn off any grave yard related plays with Doomking and going second can shut off plays with the decent hand trap line up and has good OTK potential with the hard hitters found in the extra deck.
Getting out Zombie World is usually a top priority in most cases, it helps to set up the plays of many of your cards such as Doomking Balerdroch or Red-Eyes Zombie Necro Dragon by making all cards on field and in grave zombie type. This type change is also one of the most powerful parts of the deck due to its counter potential. Decks reliant on their cards being of a certain type such as Thunder Dragon, Dino variants, Cyber Dragon are turned off. Link monster that require a certain type of monster such as Salamangreat Baleynx, Guardragons, or Xtra HERO Cross Crusader are unable to be summoned. True Draco decks are unable to summon monsters under zombie world due to not being able to tribute summon anything except zombie monsters.
The deck does have it's weaknesses, being ash blossomed to prevent grave yard set up or cards like D.D. Crow, Masked HERO Darklaw, or anything else that can banish your cards from grave or stop them from going to grave can stop a lot of plays. Decks like Orcust, Alterguist, and Pendulum as well often don't care about having their types changed making Zombie World not flood gate them.
So why play the deck? For Doomking. A card that can summon itself from grave during every standby phase, can negate any monster effect from field or grave, and has non targeting banishing removal of anything on the field or the grave. Once out he is your beat stick, you negation tool, your link fodder.
Red-Eyes Zombie Necro Dragon can become a massive beat stick based on the number of cards on field or in grave that besides Doomking is very hard to out, and even comes with his own effect to steal your opponents monsters after destroying them by any mean.
The Utopia combo is easily usable with a quick use of Uni-Zombie and a draw of Danger Jackalope or Danger Noodle and can help to deal easy game winning damage.
With Zombie World and Dragonercro Nethersoul Dragon super poly can be the answer to any board there is.