My Corruption Demons:

- Spellweaver - Monoblack Demons.png (954.49 KiB) Viewed 34809 times
Card choices:
4 x Plague Vermin - important against Goblins and Elves
4 x Mesmerizing Spirit - cheap source of card advantage. There is no particular match-up, where these are shining, but I like them a lot.
4 x Bloodwitch Harpy - our MVP. Level 1 in our deck are only the rats and the zombie tokens from Restless Tomb and Haunted Cemetery. Even when we have to sacrifice these, they are providing us with sometimes important mana acceleration. Our opponents are also happy with the witch, as they benefit from this acceleration too, right?

3 x Bedeviled Fiend - hits hard, has a reasonable speed - overall good creature.
3 x Dread Knight - the second most valuable card - just can't imagine Corruption Deck without this monster. Smashes for tons of damage and invalidates their best front line creature. And he is 4 mana, level 2, 6/6 creature. OP for me.
4 x Succubus - 8 life swing is a lot! And combined with Occultism after you attacked and killed one of their creatures is just unfair.
4 x Noxious Fumes, 4 x Consume Spirit and 3 x Infernal Tribute - our removal suite. I tried with less, but then even added Plague Vermin.
3 x Restless Tomb - zombies are slow, but against heavy removal decks, Lightning Storm decks, in the mirror match are invaluable.
Shrines:
4 x Sanctum of the Void - as it is the maximum allowed number.
2 x Haunted Cemetery - they were 4 in the beginning of testing, but I reduced their number, as the card draw from regular Corruption Shrines proved to be more important.
Notable omissions - the mythics:
Dark Portal - tried it, and soon I realized, that most of the times I am cycling it. Against a slow deck, second turn Dark Portal is game, but most of the games I play (2/3) are against AI and after the first Fireblast I am already half-dead...
Bezarok, Hell's Gatekeeper - expensive, "win more" card. He is only good against Lightning Storm decks and even then I prefer to draw Restless Tomb instead of him.
The deck is strong against multiple types of opposing strategies. Last Saturday I played it, trying to reach top-10 within a day. Almost succeeded and my record was 62-8 (48-2 vs. AI and 16-6 vs. human opponents). Try it

Later I will post my Corruption/Devotion Control, too.