>>43369470My buddy has a deck just like this, maybe a little more control focused.. its pretty easy to beat... Here's some tips/my thoughts.
Since its like half infect and half black control, its not really that good at doing either... Infect is only good when you can shit out 10 points in one turn, games where you just attrition them out with infect don't go well usually.
Hero's downfall is not good in modern, there's cheaper spells that kill creatures and walkers aren't that big in Modern outside of like Liliana and maybe the new Jace (who dies to doom blade or disfigure)
Too many colorless lands, cathedral of war sucks.. If you NEED the colorless lands, run like 2 Urborgs. I would probably run 4 inkmoth and MAYBE 1 quarter, along with some urborgs.
The Origins Liliana is terrible in this deck, you need shit to sacrifice to make her any good. The Dark Realms one is bad too since you have nothing to spend all that mana on and her minus is bad.
You may also want to look into Runechanter's Pike, it does work in my buddy's deck since he usually spends the early turns putting instants/sorceries in his yard by killing/discarding my stuff. Nice way to get some extra infect without having to run pump spells. Use like 1 or 2 pikes tops if you do.