The other huge upgrade that isn't a Vampire is, of course, Skullclamp, which if you're lucky enough to find / stick on the battlefield will draw you all the cards you need to close out the game
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It has, to name a few, Modular, Affinity, Madness, Storm, Delirium, Suspend and Converge, among others
The Ult is unlikely to ever happen (as you are most likely going to minus 4 or something when you play him), but if it does occur, the quality of the 7 permanents being put on the battlefield will generally be high enough to win the game
You can just tap all your creatures at your opponent's end-step and deal direct damage
Sticking with the Golgari guild doesnt give us too much there