Revised Mono-black control list. Thoughts?
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Lands:
21x Swamp
3x Ghost Quarter

Creatures:
4x Vampire Nighthawk
4x Geralf's Messenger
3x Phyrexian Obliterator

Other Spells
3x Duress
3x Tragic Slip
3x Sign in Blood
2x Go for the throat
2x Black Sun's Zenith
1x Geth's Verdict
3x Dismember
2x Liliana of the Viel
3x Lashwrithe
2x Mutilate
1x Liliana of the Dark Realms

Sideboard
1x Duress
1x Tragic Slip
1x Lashwrithe
3x Despise
3x Nihl Spellbomb
3x Ratchetbomb
2x Geth's Verdict
1x Black Sun's Zenith