28 Seconds Later (Casual)

This is my from scratch deck.

MAIN:
After you have 3 lands, you can use every card... EVERY SINGLE CARD!

Use Carrion Feeder, Gravecrawler, Diregraf Colossus to create a lot of zombies.

Or buff Carrion Feeder a bunch with Gravecrawler and attack with or without Cover of Darkness.

Use cycle Gempalm Polluter or Shepherd of Rot to do a lot of damage for each zombie, then use Magewright's Stone to use Shepherd of Rot again.

Use Cryptbreaker to tap zombies to draw a card faster + Throne of the God-Pharaoh for massive damage or Cover of Darkness to attack and Throne of the God-Pharaoh for more damage.

Dark Ritual early makes this super fast.

Darkness is a nice to prevent combat damage when your creatures are tapped, and Dash Hopes will either do 1/4 of their starting health to counter a card or you will counter a card.

The only issue is flying really but this deck is moderately fast. So most of the time it is not an issue.

((((Also remember Gravecrawler and Carrion Feeder can not block))))

SIDE:

Trade out Cover of Darkness with Graf Harvest if they have zombies too.

Trade out whatever you want for Foul-Tongue Shriek if you have life total issues.

Use Illusionist's Bracers with Magewright's Stone to use Shepherd of Rot 4x, the only problem is actually pulling it off.

If you are playing against players that buff a lot or have single target spells then use Imp's Mischief.

If you wanna just kill certain cards because they are too strong or something then use Malicious Affliction or if someone is preventing CMCs of 3 or less with a creature then use Snuff Out.

Use Spinning Darkness just to gain some quick life and do some quick damage or kill a creature for the cost of 3 cards in your graveyard.

Are you tired of lifelink or someone getting little health boosts here and there? Then use Needlebite Trap.

If you are going against someone that likes to get their health up to 50s 60s 100s + then keep Torgaar. Famine Incarnate.

If the opponent has swampwalk then Urborg is a good choice, I just keep 1 in my deck at all times because why not.

Temporal Extortion is just a unique card for black, it has no business being in here because it really slows this deck down but whatever.

It is the heart of the cards.