Divine Arrow

Divine Arrow deals 4 damage to target attacking or blocking creature.

Blood Seeker

Whenever a creature an opponent controls enters, you may have that player lose 1 life.

Skymarch Bloodletter

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

Swamp

Shineshadow Snarl

As Shineshadow Snarl enters, you may reveal a Plains or Swamp card from your hand. If you don't, Shineshadow Snarl enters tapped.
{T}: Add {W} or {B}.

Bishop's Soldier

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

Legion Conquistador

When Legion Conquistador enters, you may search your library for any number of cards named Legion Conquistador, reveal them, put them into your hand, then shuffle.

Cordial Vampire

Whenever Cordial Vampire or another creature dies, put a +1/+1 counter on each Vampire you control.

Epicure of Blood

Whenever you gain life, each opponent loses 1 life.

Plains

Taste of Blood

Taste of Blood deals 1 damage to target player or planeswalker and you gain 1 life.

Etchings of the Chosen

As Etchings of the Chosen enters, choose a creature type.
Creatures you control of the chosen type get +1/+1.
{1}, Sacrifice a creature of the chosen type: Target creature you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Queen's Commission

Create two 1/1 white Vampire creature tokens with lifelink.

Bloodthirsty Aerialist

Flying
Whenever you gain life, put a +1/+1 counter on Bloodthirsty Aerialist.

Vampire Neonate

{2}, {T}: Each opponent loses 1 life and you gain 1 life.

Exultant Skymarcher

Campaign of Vengeance

Whenever a creature you control attacks, defending player loses 1 life and you gain 1 life.