Megaflash 2U (You may cast this spell any time you could cast an instant. If you do, it comes into play with a +1/+1 counter on it)
When ~ enters the battlefield, target instant or sorcery card in your graveyard gains flash back until end of turn. It's flash back cost is equal to its mana cost plus 1. If you cast that spell this way, put a +1/+1 counter on it. 2/1
Eldrazi would ruin the flavor of innistrad. They just did eldrazi, phyrexians are far fetched to. They will probably base it on heavy story line.
Avacyn has probably tainted or died
I agree. In the video the way the feather turned to blood and the tone of the music my oppinion is that she got tainted by liliana, just like she did with Garruk and as such is now bad, or maybe even a demon now.