It all depends on what you are trying to accomplish with this deck. Is it a standard deck? Will it be just used for casual or will it be semi-competitive?
I see there is a bit of a life gain/life loss theme here but some of your cards are extremely highly costed like sip of hemlock and corrupt.
Consider using some lower costed killing spells like doom blade, Ultimate Price, Bile Blight or hero's downfall as they will be much more help at 2-3 cmc than sip of hemlock's 6 cost. Also Tithe Drinker with extort and lifelink fits well with your deck. Blood Baron of Vizkopa is THE BW card. Very Very strong.
If you want a bit of hand hate you can add Duress as a cheap option as well as Sin Collector.
That's about all I can help you with given the cards in your inventory/easy to find cards. The typical BW deck looks something like this: http://www.mtgdecks.net/decks/view/66299

Also It's much easier for people to see everything if you put this into a deck and then a link to it, not just typed out.

Hope this helps

Interested in some thoightseizes. Go ahead and have a look at my list. It should be up to date.

Tradelist here: http://deckbox.org/sets/395226?s=j&o=d + All cards from Mind Seize Commander 2013 deck.

I'm not really looking for anything in particular but am interested in people offering.

Hit me up and I will take a look.

I have been looking to play in a standard event for a while and finally have this weekend free. However the only standard events I could find are at Heavy Support in Etobicoke and Clouts'n'Chara in Kitchener. Heavy support is much closer for me but difficult to get to.

Is anyone in Mississauga playing there tomorrow? And if so could I catch a ride?

If you think it's too weird picking up a random guy to go to an event then that fine too...

I am looking for bulk foils to make foil proxies/tokens for a couple decks. I will do trade values at $0.15 per card (more than Face to face games). Take a look at my tradelist here: http://deckbox.org/sets/395226?s=j&o=d