The idea is to use Corruptor’s passive ability to get mana acceleration and card draw through the evil keyword.

Den of Evil is one of the best sites you could want to facilitate that.

Grigori is basically broken, allowing you to abuse diverse genesis abilities like Grand Masterwizard, since the wizard is now undead.

To make it go faster, I use the mixes, which can be fetched with Highland Princes (which can be abused, in a good way, by Grigori’s ability.

Fallen Angels are a blast to cast, since they boost themselves and other allied Demons around, and they can be used by Demonic Contract to find Daperyll Vampire.

Balor and Withering Hero also help finding any possible card in the deck.

Falconer should help with agro decks finding Sacred Scarab + bridges.

This deck can do some special things like Highland princes turn one to find p. Stone, cast Morgana on turn 2 even without threshold.

Sisters can bury a heavy undead you may have in hand to allow you casting carrionette to bring it back.

I find mixes essential as this deck is threshold greedy.

Mulligan to find an early playable hand + early bomb, like mix + vampire or turn 3 balor or Fallen angel.