Twisted Experiment

Enchant creature
Enchanted creature gets +3/-1.

Carnophage

At the beginning of your upkeep, tap Carnophage unless you pay 1 life.

Diabolic Edict

Target player sacrifices a creature of their choice.

Skittering Skirge

Flying
When you cast a creature spell, sacrifice Skittering Skirge.

Unholy Strength

Enchant creature
Enchanted creature gets +2/+1.

Black Knight

First strike (This creature deals combat damage before creatures without first strike.)
Protection from white (This creature can't be blocked, targeted, dealt damage, or enchanted by anything white.)

Swamp

Cursed Scroll

{3}, {T}: Choose a card name, then reveal a card at random from your hand. If that card has the chosen name, Cursed Scroll deals 2 damage to any target.

Dark Ritual

Dauthi Slayer

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

Dauthi Horror

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