@ nastirth
I have been following the spoilers and have been considering the ramifications of the upcoming cards. Some of what I am going to say is dependent upon tomorrow's bannings as well but at the moment let's just consider the deck as is.
I think that Purify the Grave is a bit narrow due to the casting cost. It is really good for decks running white (obviously), so it will probably see play in Stoneblade, Zoo, and Maverick. Otherwise I think there are better options for grave hate in forms already discussed at length here.
Snapcaster Mage... well I think he will be another card you must take into account when trying to reanimate threats. Can your opponent cast him and still cast a counter or kill spell (notable spells would include Spell Pierce and Mental Misstep in my mind [Daze and Force are not really going to be re-castable from the yard at the speed we hope to go off] and Misstep would just be nuts with this guy). I think this shouldn't be an issue as you know what is in their graveyard and by leaving open enough mana they may broadcast the play. On the other hand, I was thinking this card may warrant testing as he would allow for turn 3 or 4 additional reanimation attempts against control decks that manage to beat you in the counter war. The problem with that is, we would have to find space for him. I am pretty happy with my 75 at the moment so that would be an issue for me.
Evil Twin could be good against us. However, as you pointed out, the cost is prohibitive to many decks (unlike Metamorph). It could see fringe play, but I doubt it will cause us real issues.
Nephilia Drownward not even close to being good enough. Its effect is too slow, it doesn't produce colored mana, and the ability is sub-par unless paired with luck or a lucky Brainstorm. Straight up, it doesn't make the cut.
Balefire Dragon is interesting. I agree that it warrants some playtesting. It is a solid frame (6/6 is out of Dismember range), has evasion, and potentially can cause a one-sided Wrath effect. I think we have a more offensive version of Elesh here. It can kill bigger things but requires you being slightly more "all in" as you lose the ability to block if necessary. In comparison it is a bigger risk, bigger reward situation. Just like many of the other creatures we run right now, we would have to protect him. So that would make Mental Misstep very good, if/when we dig this guy up. However, since it is being looked at for banning that makes this hard to call. I think he could very well deserve a slot in the 75 but play testing will tell.
I have not seen anything that really caught my eye. However we still have a good number of cards to find out about. So maybe we will get something cool here this weekend. Good calls overall for discussion nastirth. Thanks for the food for thought!

