back when i used to play MTG all the time, everyday with my friends and family members, i created this first turn kill deck. i called it "My Bargain Deck" it worked quite well. when i went to tournaments, i would bust the deck out, for casual games, and i would build a whole crowd of people around the table. at the time is was only around 50 bucks to make, now its a 100. i can not remember every card in it but i did my best to re-create it.
4 yawgmoth's bargain
4 yawgmoth's will
4 culling the weak
4 priest of gix
4 dark ritual
4 reaping the graves
4 drain life
4 lotus petal
4 cabal ritual
4 Consume Spirit
20 swamp
say you start out with 1 bargain, Culling the weak, 2 swamps, lotus petal, priest of gix, dark ritual. play the swamp and petal. dark rit. priest of gix. you have 3 mana in your mana pool/ play Culling the weak on the priest to at 4 more to you mana pool. you now have 6 black mana now. play the bargain. now draw card until you get more priests, dark tiruals, and culling the weak. continue doing that basic combo of sacriificing the priest of gix with culling the weak. once you've expended your life to no less than 3, unless you went first, then 1 by drawing all the right cards use the reaping the graves on the priest of gix and have played them, use Yawgmoth's will to replay all the mana producing cards. build up enough black mana

to cast a drain life for 20. you win. it won by first turn about 80% of the time. you can only mulligan once or twice.
if you can think of a better way to produce this deck feel free to share. i most likly will not be using this site much, cause of my lack of a computer and internet at home. but i will check randomly.
Thanks
Kris