Punishment for all

[Vastros]

This deck has been a pet of mine for years, Ive tuned it to the best of my abilities but I think it still needs a bit of work. Any thoughts would be appreciated, as I'm trying to make it viable.

Creature (22)
4x Bloodghast
4x Butcher of Malakir
4x Lord of the Pit
4x Nether Traitor
4x Reassembling Skeleton
3x Viscera Seer
Enchantment (16)
4x Attrition
4x Grave Pact
4x Last Laugh
3x Screams from Within
Land (22)
4x Cabal Coffers
10x Swamp
2x Urborg, Tomb of Yawgmoth
4x Verdant Catacombs
2x Marsh Flats

[Hardcore]

4x Bloodghast
4x Butcher of Malakir
4x Lord of the Pit
4x Nether Traitor
4x Reassembling Skeleton
3x Viscera Seer

4x Attrition
4x Grave Pact
4x Last Laugh
3x Screams from Within

4x Cabal Coffers
10x Swamp
2x Urborg, Tomb of Yawgmoth
4x Verdant Catacombs
2x Marsh Flats

[Greenpoe]

This is definitely too slow for Legacy, but at any rate, you should try Demon of Death's Gate. He seems pretty solid in this deck, though you might want some zombies and Gravecawler for recursion.

[Poron]

You missed the only card that gives this deck a sense: Contamination

but that's not enough anyway

[rufus]

How do you feel about cards like Rotting Rats or Smallpox that do symmetric discard?

What about dredgers?

From a competitive perspective, if you want to be a slow controlling deck, you need to be able to deal with decks like burn or combo that aren't dependant on creatures. If you want to be a fast agressive deck, then the fatties like Lord of the Pit and Butcher of Malakir aren't really playable.

Speaking of fatties, something like Helldozer or Tombstalker might be better at winning games for you.

If you do play more zombies, Gravecrawler is a strong card, and thematically appropriate.