Dauthi Horror

Shadow (This creature can block or be blocked by only creatures with shadow.)
Dauthi Horror can't be blocked by white creatures.

Diabolic Edict

When Priest of Gix enters the battlefield, add {B}{B}{B}.

Return target creature card with mana value 3 or less from your graveyard to the battlefield.
Cycling {2} ({2}, Discard this card: Draw a card.)

{B}: Nantuko Shade gets +1/+1 until end of turn.

As an additional cost to cast this spell, exile X cards from your graveyard.
You draw X cards and you lose X life.

Destroy target nonblack creature. It can't be regenerated. You lose life equal to that creature's toughness.

Flying
Whenever Hypnotic Specter deals damage to an opponent, that player discards a card at random.

Shadow (This creature can block or be blocked by only creatures with shadow.)
Dauthi Slayer attacks each combat if able.

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.