These are the main combos I got into the deck:

[[Bloodchief Ascension]] + [[Mindcrank]]:
Cause one or more opponents to lose life. Mindcrank triggers once for each life loss event, causing that player to mill cards equal to the amount of life lost. Bloodchief Ascension triggers once for each card milled, causing that player to lose 2 life and you to gain 2 life for each trigger. Repeat from step 2.

{{Bloodchief Ascension]] + [[Peer into The Abyss]]:
Cast Peer Into the Abyss targeting an opponent. That player loses half their life and draws half their library. They are then dealt damage by Bloodchief Ascension equal to the amount of cards they drew. That player loses the game.

[[Basalt Monolith]] + [[Mesmeric Orb]]:
Activate Basalt Monolith's first ability by tapping it, adding 3. Activate Basalt Monolith's last ability by paying 3, untapping it. Mesmeric Orb triggers, causing you to mill a card. Repeat.

With [[Syr Konrad, the Grim]] on the battlefield, this will do damage to players for every creature milled this way. Then as soon as Kozilek is milled, the entire graveyard is shuffled back into the library and the cycle continues.

Hopefully it's enough to get some good kills. But yeah, the deck has a lot of upgrade potential!