It was decided early in game development that there would be both historical and fictional themed decks, and there's nothing more fun than a fictional themed monster deck based on Death and Destruction.
The general idea was that cards would get stronger as more death occurred, which meant the deck needed cards whose purpose was to be destroyed. The idea of Death consuming souls resonated, so we have our Souls of the Living and Powerful, as well as cards that give and take souls.
From there it became about how to unleash destruction, while also realizing that Death doesn't care what it feeds on, so any card in the deck could be a target for destruction if needed! But you can never kill a Zombie Horde. They just keep coming back...
To round off the deck, it was fun to think about resurrecting the dead with a Necromancer as a way to cheat Death. All of that work to build up your death count, only to decide, "nah, let's bring everyone back and do it all again!"
The deck symbol is a skull and crossbones because, well duh.
Cards with more than 1 copy per deck appear with their number in parentheses (#).
(4) Cannon fodder plus essence
Gain from your destruction
(2) Time to eat
Make death more bountiful
Anchor those moving cards
Bye-bye valuable card
Help you, annoy them
(2) Cannon fodder plus might
Stop those instants
(2) Time to devour
They just won't die
Stun those conditionals
Crush the little guys
Careful playing with the undead
Ouch
Who says Death can't be giving?
The more Death, the more Death
Spectres of the Necropolis is a High Complexity deck that relies on destroying your own cards and building a destroy pile. Some cards gain might as they destroy cards, while others become more powerful the more you destroy.
Deploy Taker of Souls as quickly as possible so it can build might as you destroy cards throughout the game. Your goal is to setup destroy combos.
Position your Souls and Zombie Hordes to be easy prey for your Eater of Souls and Devourer of Souls. Enhance the might they gain by deploying the Death Enhancer in the zone right before an Eater or Devourer to maximize the might bonus.
Force your opponent to make a difficult choice with My Soul For Yours and increase the size of your destroy pile. Create a large destroy pile to maximize Aspect of Death and Giver of Souls, or raise the dead with The Necromancer if you need more cards.
Always destroy cards from left to right on the battlefield and one at a time, resolving one card before moving to the next.
When Zombie Horde is destroyed once for a given ally card's reveal, it does not get destroyed again by that same card. It may be destroyed by two or more different cards in the same round, though. When Zombie Horde is destroyed, this does trigger the conditional ability on Taker of Souls.
Death Enhancer doubles might gains from abilities on the following cards: Eater of Souls, Soul of the Powerful, Devourer of Souls, and Zombie Horde. Death Enhancer can double the might gains of Taker of Souls, but only if they are both on the same Battlefield. As you destroy Death Enhancer itself, do not double might gains.
The discard ability for Ashigaru and Ikko-Ikki resolve as the following: decide to discard either card by placing it face down in the discard pile, then announce its ability to your opponent, then lastly perform its ability. This discard does trigger the Conditional ability on Sohei.
Cards deployed from the discard pile by Ashigaru, Itako, and Abe no Seimei are actual deployments and should be placed face-down and revealed after any other cards you deployed this round.
The final discard for Oni follows First Player Token order. You must have a card to discard for Oni to gain might.