I originally made the deck because I had singles of great black and green cards like Deathrite shaman that I did not play because I didn't have more, also because I like sacrifice most of my decks run around it. There are many good combos using the commander because as you see most of my cards allow me to sacrifice my own stuff which enables life gain or board control. As long as I have perilous forays and or Phyrexian vault I can continuously sacrifice enabling Savra's ability and If mortician beetle is in play he as well gets stronger. I use cards like Fertile Imagination and Howl of the night pack to fuel Savra and my life. The deck is decently fast but may take some setting up with few cards above 5CMC in my creatures (Though avatar of Woe is 8CMC she generally drops turn 5 for 2 mana depending on what is going on)
I am currently looking for Darkest Hour and a few other cards to go in here so it is not complete. I have a Putrid Leech, and Demon of Death's Gate I am thinking of adding in place of something but not quite sure if I should though.
I do not have the chance at the moment to play against many different commander decks but the ones I have versed the deck has shown positive results against control decks.