You could build Modern Dredge. Its a fast aggro deck that mills itself using
Dread cards (like
Golgari Grave Troll and
Life from the Loam) to rapidly fill it's graveyard, then uses creatures like
Bloodghast,
Narcomoeba, and
Prized Amalgam to swarm the board. It's a fun deck that can pump out huge power quickly, and is very difficult for your opponent to
disrupt (since almost none of your spells are actually cast and your creatures can all come back from the yard). Obviously, it's weak to graveyard hate, but the sideboard is full of ways to get around that.
A common list looks something like this:
4
Faithless Looting #Discard your Dredge cards or creatures out of your hand, use the draws to dredge. Flashback is also great
4
Insolent Neonate #T1 play, then Sac to discard a Dregdge card, and then dredge instead of drawing
1
Lightning Axe #Removal that gets rid a card in hand (like a gravetroll)
4
Narcomoeba #flying power that triggers
Prized Amalgam4
Bloodghast #does most of the work
4
Tormenting Voice #discard a drege card, dredge and draw
3
Life from the Loam #gets back all the lands you've milled and can even be dredged itself
4
Stinkweed Imp #alternate dredge target when Gravetroll isn't in hand
4
Prized Amalgam #the beats
4
Golgari Grave-Troll #the engine of the deck
3
Conflagrate #dump whole hand, kill pesky opposing stuff
2
Blood Crypt4
Bloodstained Mire4
Copperline Gorge2
Dakmor Salvage3
Mountain1
Steam Vents2
Stomping Ground3
Wooded FoothillsAnd of course you can alter the list at your leisure and find what you like best! Enjoy