BW Clerical Error [Modern] (Modern)

This deck revolves around tokens. The Hanweir Militia Captains and Thaben Doomsayers produce human tokens every turn and the Xathrid Necromancers turn those human tokens into zombie tokens when they die.
Zulaport Cutthroats provide damage and HP every time a token dies.
The Doomed Necromancers and Hell's Caretaker provide an easy way to get cards back from the grave and also provide an easy combo to get tokens. Sac DN and return another DN from the grave. Do this for as much mana as you want to get free tokens and damage/HP.
Thalia's lancers help to find copies of Ayli and Kalitas. Ayli provides an easy way to sac humans and gain HP at the same time. Kalitas provides graveyard disruption and another way to sac creatures.
The Eldrazi Monuments provide a huge amount of value in +1/+1, flying, and indestructible for all your creatures, plus being able to sac another creature every turn.
Endless Ranks of the Undead just provides more free zombies.
Harsh Sustenance provides a finisher in case the zombies aren't enough. If you can stack enough tokens then you will likely be able to kill your opponent with one cast. You can also use this to kill of powerful creatures if you need to.