There is no reason to have anything that deals normal damage to your opponents, so a lot of the cards that you threw in are actually kind of pointless:
- Sheoldred, the Whispering One
-
Ghastly Conscription-
Desertion (it's pretty unlikely that your opponent is running an infect deck)
-
Erebos, God of the Dead-
Open the Graves-
Lotleth Giant-
Drana's Chosen-
Phyrexian Obliterator (although I might keep him for defense if you change it to mono-black)
At this point, a lot of your more expensive cards are gone, so I'd remove:
-
Caged Sun-
Thran Dynamo-
Crypt GhastThen, sadly, having a creature that gives other creatures +1/+1 does not count as them having +1/+1 counters, and
Death Baron only boosts very few cards, so I'd remove:
-
Death Baron-
Herald of Secret StreamsI have no idea what benefit this card has:
-
Thran LensAt this point, we need more ways to beef up the good cards you already have. If you have more copies, I would add more:
-
Whispersilk Cloak-
Hand of the Praetors-
NecroskitterI also would seriously consider making your deck mono-black, because blue doesn't add a ton. This would mean that you don't get to go proliferate-crazy, but it would definitely improve the deck. If you want to stay blue, though,
Contentious Plan is a great budget card for your deck.