Grixis.

[Calebestes]

Need some help with making a grixis deck.

[Joshnoodles]

I suggest using zombies as your main cards and the basing your other cards around that. Use  {Gravecrawler} as an infinate monster then use  {Grimgrin, Corpse-Born} and  {Falkenrath Aristocrat} to sacrifice it to get abilities. Throw in some control cards and u have a pretty good deck.

[Calebestes]

I was thinking more towards grixis control, planeswalkers.