This is a modified Demonic Deals intro pack deck, it's much better now. I've beaten a pretty wide variety of decks with this deck now, I feel it's quite strong.
This deck is all about stealing the opponent's creatures and then sacrificing them after they're used against their owner, grave-robbing from both graveyards, powering-up Nantuko Husk & Malakir Cullblade in a blink, and swinging out when the opponent is defenseless. If that isn't enough there's chip damage on the side and complete creature boardwipe with at least one of your creatures left standing. Despise and Hero's Downfall help cover this deck's most glaring weakness, Planeswalkers. If Kolaghan's Command is too pricey for your tastes you can substitute-in Smash to Smithereens or another removal of your choice.
CREATURES:
Nantuko Husk - Wow does this card bring options to the table! You can sac a creature after stealing it with Act of Treason to get +2+2 for your attack phase, sac a creature that you're forced to block with or that gets targeted by a removal spell to get +2+2, or sac multiple creatures and then use Chandra's Ignition to wipe all of the opponent's creatures off the field while hitting him with heavy direct damage at the same time. Free instant sacing is very versatile, especially when it also gives +2+2.
Undead Servant - A card that goes from "meh" to "awesome" in a short time. He may not seem like much at 3/2 for four cmc but there's major hidden value. If the opponent chooses to kill him or you choose to sac him you now have a guaranteed 2/2 token coming out with the next one and so on. The tokens can be used to attack/block, or as sac fuel to boost Nantuko Husk, or do direct damage to the opponent via the other two sacing creatures you control.
Malakir Cullblade - Keep this guy alive. Your opponent is going to lose a lot of creatures and Cullblade is going to get big very quickly with an empty field in front of him.
Fleshbag Marauder - Great for boosting Cullblade and evening the field thanks to his power of three. If you don't have anything out that you want to sac, save him for later and/or sac him with his own ability as he enters the field to scry via Shadows of the Past and boost Graveblade Marauder.
Blazing Hellhound - Tough creature with a cheap sac cost to hit the opponent with direct damage for each creature you sac.
Tymaret, the Murder King - Easy to cast, no compromise in power/thoughness, and can sac for considerable direct damage from the field or come back into your hand if you're low on creatures. He's a great early and late game option provider.
Graveblade Marauder - Excellent defensive wall that you can attack with that also turns into a serious offensive threat later in the game when your opponent is low/out of creatures.
Typhoid Rats - Early game damage prevention that will eat one or two of the opponent's removal spells. Sac them as they get removed to boost Nantuko Husk ;).
Archfiend of Depravity - Strong flyer that keeps the opponent's defenses low while at the same time pumping Cullblade.
Shambling Goblin - I like this guy. His death can take out a pesky thopter, or remove just enough toughness off of a creature for you to kill it with damage from one of your creatures/spells.
NON-CREATURE SPELLS:
Act of Treason - Steal opponent's strong creature, hit them with it, and then sac it to make Natuko Husk stronger or to hit the opponent for additional damage.
Chandra's Ignition - Have a pumped up Cullblade/Nantuko kill every creature (except itself) and also do major damage to the opponent. Go from losing to won in a blink of an eye.
Shadows of the Past - So much scrying, and an instant direct damage & lifegain option later.
Necromantic Summons - You'll have a lot of creatures to choose from thanks to all the killing, sac'ing, removing, and Despising. The spell mastery makes this superb.
Kolaghan's Command - Perfect options for this deck, and artifact removal too!
Macabre Waltz - If you need creatures. Great for bringing back an Undead Servant when multiple are in the graveyard.
Despise - Excellent card for planning your next actions and removing dangerous creatures/planeswalkers. Take control of removed creatures afterwards with Necromantic Summons.
Fiery Impulse, Ultimate Price, Hero's Downfall - Instant Removal.
