You could abuse Athreos with evoke and persist. Say you evoke Mournwhelk or Shriekmaw . That's essentially a mind rot(albeit for 1 more mana) and a doom blade with the added bonus that unless your opponent pays 3 life, you get them right back in your hand to evoke again, so unless your opponent is sitting on tons of creatures and needs nothing in their hand, those two essentially become 4 mana-discard 2 and lose 3 life, and destroy non-black creature and lose 3 life.

With persist, you can abuse things like Kitchen Finks and Murderous Redcap due to the fact that persist and Athreos trigger at the same time, meaning you decide which goes first. On the first death, you let persist trigger, which means Athreos no longer has a legal target and you simply get the creature back with a -1/-1 counter. The second time however, you get to let Athreos' ability come into play. They die and you opponent can either pay 3 life and keep it dead, or you can bounce those persist creatures right back to your hand and start all over.

That persist bit is just my interpretation but the order of the stack is a bit weird so having a judge confirm that would be nice. I am typing from my phone so can't check now.

I like the deck. Looks like a lod of good exploitation going on here. You might consider adding more Xathrid Necromancer cards. Especially with Athreos, God of Passage , Blood Artist , and Viscera Seer you can double sac all of your creatures, and get them back in your hand.

You may not need the Intangible Virtue . There are a lot of tokens in the deck, but most of them make better sac fodder than creatures. It's your choice, but I think more sac combos would be better than some bigger tokens, which you'll probably want to kill anyway.

Thanks Necrotize lowlyslayer for the comments.

Necrotize liking the evoke ability will have a look at seeing if there are any other low mana good options in modern.

lowlyslayer think your right gunna drop Intangible Virtue its just taking up space

going to add another Xathrid Necromancer as well there are a lot of humans in deck might aswell exploit it :D.

I'm going to start throwing cards at you. Mortician Beetle , Maw of the Obzedat , Meadowboon , Mind Slash , and Altar's Reap These were just some sac cards I found on gatherer, but you might consider a few, if you need them.

Thanks for the suggestions :D.

Mind Slash Is really cool will give it some thought and see if It can get

a add in got allot of 3 mana in the deck so may need to re tweak the deck abit.

Have been thinking of putting Altar's Reap in like my other deck

for some extra draw due to the tone of low mana drops.

Just need to find some stuff to take out.

For a big dude, Phyrexian Soulgorger ?

I've made a similar deck Gorging on Souls That surrounds him, but he would work here too.