An alternative Kulrath KnightKulrath Knight, Spitting DilophosaurusSpitting Dilophosaurus, has the potential to come down and be a game ender by making all of those -1/-1 counters really mean the end for your opponents
Obscuring Haze While certainly not as powerful as its siblings Fierce Guardianship and Deflecting Swat, Obscuring Haze is still very strong
Gunk Slug is a neat design thats so frustrating to play against (I think its based on custom cards once played at a convention by Richard Garfield, though it mightve been Rosewater)
Collected Company is a great card, and playing it with Thought-Knot Seer might be the way I want to go, but it does seriously restrict deckbuilding, and I wonder if its created some blind spots
Black mana, as you might suspect, lets loose a range of nasty creatures, with names like Plague Rats and Demonic Hordes