This is an aggressive Tribal deck that can generate card advantage with Cryptbreaker or power up its undead hordes with Lord of the Accursed and Death Baron.

Creatures (32)
4
Cryptbreaker
4
Diregraf Ghoul
4
Dread Wanderer
4
Lazotep Reaver
4
Relentless Dead
4
Death Baron
2
Diregraf Colossus
4
Lord of the Accursed
2
Murderous Rider
Spells (6)
4
Dark Salvation
2
Thoughtseize
Lands (22)
2
Castle Locthwain
2
Mutavault
15
Swamp
3
Urborg, Tomb of Yawgmoth
Cards (60)
Sideboard (15)
3
Fatal Push
2
Thoughtseize
2
Sorcerous Spyglass
2
Midnight Reaper
2
Murderous Rider
4
Leyline of the Void