Ok so I'm trying to build a new deck, but I can't figure out what to do now. I don't have a lot of new cards, so I'm limited. So far I have in the deck these cards (and all are x1):
{Lich Lord of Unx}
{Undermine}
{Zombie Outlander}
{Agony Warp}
{Curse of the Bloody Tome}
{Forbidden Alchemy}
{Tidespout Tyrant}
{Cemetery Reaper}
{Hissing Miasma}
{Bone Saw}
{Alter of Shadows}
All feedback is welcome, and I appreciate it a lot. This deck is meant to be a Black/Blue. Thanks.
Mill is fun :)
{Grimgrin, Corpse Born} is a cool zombie to play. If you want to go all out with mill, check out {Undead Alchemist}. That thing can really get out of hand! {Graveborn Muse} is a good way to draw cards so you can end the game. {Endless Ranks of the Dead} is cool too. {Diregraf Ghoul} can be useful also. In terms of removal, {Doom Blade} is awesome. I like {Go For the Throat} too. For those plainswalkers, {Cyclonic Rift} is great, then maybe you can counter it the next time it tries to resolve. If you need more mill, {Memory Erosion} can funny, and deadly! {Jace's Erasure} is good by itself, and even better with {Graveborn Muse}. {Nephalia Drownyard} is a fantastic way to mill your opponents. If you find your opponents using your mill to their advantage (with things like {Exhume} and {Reanimate}), {Leyline of the Void} can solve all of yor problems!
I suggest finding cards you like and getting more of them, to make your deck consistent. Or, you could keep everything as a 1-of and make it an EDH deck, with perhaps {Grimgrin, Corpse-Born} as your commander!
Good luck with deck building!