I've included a singleton of Mage-Ring Network as a replacement for one of my sanctums of Ugin as every time I drew the second sanctum I found myself wishing it was any other land and I believe the benefits of being able to boost my mana pool by even 1 or 2 more allows me to cast my fatties much more reliably and earlier.
Quarantine Field is fantastic and as soon as I'm able I'm going to purchase a second one to be swapped in possibly for Sigil of the Empty Throne based on how efficacious I find it be in the coming days but I do think with the amount of enchantments in the deck it will prove itself to be a great addition providing me with solid blockers and the ability to really keep the pressure on my opponent.
I have included a Breaker of Armies in exchange for one Blight Herder as I think 4 was slightly too many and breaker is able to be tutored for by either sanctum or Conduit of Ruin and I believe it will really help against go wide strats as well as blowing away those pesky mana dorks I don't want to waste removal on and drawing some of my opponents removal away from my definite game winners like Ulamog and Void Winnower.
Four of Silkwrap was definitely too many so I've reduced it to 3 as I find that I still find a use for them in most games and when I had less I found myself missing them.
In regards to card draw Ob Nixilis as I mentioned earlier is just great for helping pull what you need when you don't have it but if I have what I need in hand I find myself shying away from using his ability because I don't want to punch myself in the face too many times or I can be killed too easily by decks with burst potential (seeing as I don't have any counters to mitigate this), so he's a singleton at this point. I have 2 Hedron Archives for a little extra mana but mainly as a card draw engine for when I need it, a role they fit exceptionally well in this deck.
I have also replaced one Languish with Planar Outburst to see how it performs and will probably be replacing one of them with the other to make the chosen one a two of and siding the other for the match-ups that favour one or the other, I also believe it's awaken effect will also prove very useful for longer games and help tip them in my favour.
Regarding what I would like to add in the future I want to increase my Shambling Vent count to 4 because it's just great, as stated earlier I definitely want to go to 2 of Quarantine Field and I like to try out both Sorin, Solemn Visitor and Ugin to see whether they fit into the deck and my game plan. Liliana is another option I'm thinking of trying out but I'm not sure yet. I will also be replacing my Arashin Clerics with Surge of Righteousness as soon as I'm able because I think they suit the deck's plan much better.
