Bloodflow Connoisseur

Sacrifice a creature: Put a +1/+1 counter on Bloodflow Connoisseur.

Markov Patrician

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Flying (This creature can't be blocked except by creatures with flying or reach.)

Flying
When Bloodhunter Bat enters, target player loses 2 life and you gain 2 life.

When Ravenous Chupacabra enters, destroy target creature an opponent controls.

Tormented Soul can't block and can't be blocked.

Flying
When Skymarch Bloodletter enters, target opponent loses 1 life and you gain 1 life.

Flying
When Dark Revenant dies, put it on top of its owner's library.

Enchant creature
Enchanted creature has "{1}{B}, {T}: Target player loses 2 life."

Exile target creature card from a graveyard. Create a 2/2 black Zombie creature token.

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

Whenever Stromkirk Patrol deals combat damage to a player, put a +1/+1 counter on it.

Enchant creature
Enchanted creature gets -2/-2.
At the beginning of the upkeep of enchanted creature's controller, that player loses 2 life.

Flying
When Vampire Sovereign enters, target opponent loses 3 life and you gain 3 life.

Flying
Whenever Vampire Envoy becomes tapped, you gain 1 life.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Whenever you gain life, each opponent loses 1 life.

Enchant creature
Enchanted creature gets +1/+1.
When enchanted creature dies, return that card to its owner's hand.