Vampire Lacerator

At the beginning of your upkeep, you lose 1 life unless an opponent has 10 or less life.

Skittering Skirge

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

Carnophage

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

Swamp

Malakir Blood-Priest

When Malakir Blood-Priest enters, each opponent loses X life and you gain X life, where X is the number of creatures in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

Bonesplitter

Guul Draz Vampire

As long as an opponent has 10 or less life, Guul Draz Vampire gets +2/+1 and has intimidate. (It can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Victim of Night

Destroy target non-Vampire, non-Werewolf, non-Zombie creature.

Foul-Tongue Shriek

Target opponent loses 1 life for each attacking creature you control. You gain that much life.

Duress

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

Changeling Outcast

Changeling (This card is every creature type.)
Changeling Outcast can't block and can't be blocked.

Sign in Blood

Target player draws two cards and loses 2 life.

Diabolic Edict

Target player sacrifices a creature of their choice.

Unholy Strength

Enchant creature
Enchanted creature gets +2/+1.