There have been legacy decks in the past that were able to win a game in the first round, without even giving your opponent a chance to act. I wonder how many rounds minimum it would take to win a game in the Innistrad block format. In this format there are only cards allowed from Innistrad, Dark Ascension and Avacyn Restored.

The assumptions are:

Your opponent is totally passive and does not play more than a single land each turn until he loses.

You start with the perfect hand and each card you draw is the perfect card.

The deck must be legal.

Please show the winning sequence with your answer.