This deck focuses on locking down your opponent. It is an aggressive deck and best going first. First thing you want to do is get out zombie world. Which you have multiple ways to access.
This deck is very consistent and easy to play. Now I will list the purpose of each card in the deck.
Main Deck
Monsters
Doomking Balerdroch: 1 monster negate and banish per turn with zombie world out.
Jack-o-Bolan: Send a zombie monster from your hand to the graveyard. The best cards to send are Necroworld Banshee and Glow-Up Bloom if you have zombie world out. While this card is on the field during your opponents turn you can use it to summon a zombie monster from your graveyard.
Necroworld Banshee: This card is mainly to get zombie world out. You want this in the graveyard at all cost while you do not have zombie world out yet. Do not summon unless you have no other option. This is also the first card you want to send to the graveyard with any effect while you do not have zombie world out on the field.
Mezuki: This card is used as a way to make Union Carrier more usable. If you have a way to send
Shiranui Solitaire: Summon this to use its effect to summon Uni-Zombie.
Uni-Zombie: If you do not have zombie world out use this to send Necroworld Banshee from your 1 Your hand and 2 Your deck if Necroworld Banshee is not in your hand. And after you do that use its effect to send Glow-Up Bloom the the graveyard. This card can also be used to synchro summon.
Dragon Buster Destruction sword: Drawing into this card is like drawing into a garnet. It is not something you want to draw but it is ok if you do. Do not send it to the graveyard as it is the card you equip to Doomking Balerdroch with Union Carrier. Doing this locks your opponent out of the extra deck.
Glow-Up Bloom: Send this card to the graveyard while zombie world is on the field to special summon Doomking Balerdroch from your deck. Keep in mind. You can only do this once per turn. A very good way to use this is to summon it to the field with another zombie monster while you have zombie world on the field to go into Union Carrier and then use its effect allowing you to summon Doomking Balerdroch and lock out your opponent from their extra deck.
Spells
One for One: Use this card to send a monster from your hand to the graveyard while you have zombie world on the field to special summon Glow-Up Bloom. Then Link Summon Linkuriboh to activate Glow-Up Blooms effect. This card is also an easy way to get out Union Carrier as you summon Glow-Up Bloom with this card and have another zombie monster on your field you can link summon Union Carrier and activate Glow-Up Bloom you can then Special summon doomking Balerdroch and then equip Dragon Buster Destruction Sword to it to lock your opponent out of the extra deck.
Dragged Down into the grave: Make sure you have nothing in your hand you want to keep before playing this card. This is a good way to check your opponents hand for any troublesome cards and you can force your opponent to send one of the cards from your hand into the graveyard.
Harpie's Feather Duster: Use this card to clear you opponents back row. This is a good card in any deck.
Triple Tactics Talent: This card is very good. Once your opponent activates any monster effects on your turn you will be able do one of these things: Take Control of one of your opponents monsters for the rest of the turn, Draw two, Or discard one card in your opponents hand of your choice. I recommend drawing 2 tho.
One Day of Peace: Essentially a plus a card to raise efficiency of the deck.
Upstart goblin: Just use it. It makes the deck basically a 39 card deck.
Card Destruction: Allows you to use zombie graveyard effects and see what kind of deck your opponent is using for your virus card. Cards to set, summon, or activate before use are; Zombie world, Uni-Zombie, Eradicator Epidemic Virus, and Rivalry of Warlords.
Terraforming: Use to get zombie world.
Foolish Burial: Use to send Necroworld Banshee to the graveyard if you do not have zombie world out. And if you do have zombie world out use to send Glow-Up Bloom to the Graveyard.
Twin Twisters: Discard and destruction of opponents spells and traps.
Super Polymerization:Use this card to special summon using your opponents monsters while you have zombie world out. If you go first set this card and wait until your opponent has 2 monsters out. If you go second activate zombie world first then use this card.
Zombie world: makes all monsters zombie type.
Traps
Infinite Impermanence: Used to negate a monster effect.
Eradicator Epidemic Virus: Use this card to send Balerdroch to the graveyard during your opponents draw phase. If you do not know what type of deck your opponent is using always choose spells.
Rivalry of Warlords: Used with Zombie world to limit your opponent to basically 1 monster on the field.
Extra Deck.
Dragonecro Nethersoul Dragon: This is the monster you summon with Super Polymerization.
Union Carrier: If you manage to get this card out only do it by using Glow-Up Bloom as a Material for it while Zombie world is on the field so that you can get out Doomking Balerdroch to the field to equip your Dragon Buster Destruction sword to.
The rest of the extra deck cards are not as important and you can choose to use them or not.
For the side deck you can change those cards if you want to.