High Marshal Arguel

When High Marshal Arguel dies, conjure a card named Arguel's Blood Fast onto the battlefield and you may transform it. If you control an enchantment named Arguel's Blood Fast and a land named Temple of Aclazotz, instead create two 4/3 white and black Vampire Demon creature tokens with flying.

Dusk's Landing

Draw a card. If an opponent lost life this turn and you gained life this turn, seek two Vampire cards instead.

Nightmare

Flying (This creature can't be blocked except by creatures with flying or reach.)
Nightmare's power and toughness are each equal to the number of Swamps you control.

Murder

Plains

Demon of Loathing

Flying, trample
Whenever Demon of Loathing deals combat damage to a player, that player sacrifices a creature of their choice.

Charmed Stray

Lifelink
When Charmed Stray enters, put a +1/+1 counter on each other creature you control named Charmed Stray.

Scoured Barrens

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {W} or {B}.

Vampire Opportunist

{6}{B}: Each opponent loses 2 life and you gain 2 life.

Knight's Pledge

Enchant creature
Enchanted creature gets +2/+2.

Tactical Advantage

Target blocking or blocked creature you control gets +2/+2 until end of turn.

Sengir Vampire

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever a creature dealt damage by Sengir Vampire this turn dies, put a +1/+1 counter on Sengir Vampire.

Aeronaut Cavalry

Flying
When Aeronaut Cavalry enters, put a +1/+1 counter on another target Soldier you control.

Savage Gorger

Flying
At the beginning of your end step, if an opponent lost life this turn, put a +1/+1 counter on Savage Gorger. (Damage causes loss of life.)

Miner's Guidewing

Flying, vigilance
When Miner's Guidewing dies, target creature you control explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on that creature, then put the card back or put it into your graveyard.)

Ambush Paratrooper

Flash
Flying
{5}: Creatures you control get +1/+1 until end of turn.

Angelic Reward

Enchant creature
Enchanted creature gets +3/+3 and has flying.

Vraan, Executioner Thane

Whenever one or more other creatures you control die, each opponent loses 2 life and you gain 2 life. This ability triggers only once each turn.

Swamp

Pacifism

Enchant creature
Enchanted creature can't attack or block.

Sengir Connoisseur

Flying
Whenever one or more other creatures die, put a +1/+1 counter on Sengir Connoisseur. This ability triggers only once each turn.

Go for the Throat

Cruel Cut

Destroy target creature with power 2 or less.

Malakir Cullblade

Whenever a creature an opponent controls dies, put a +1/+1 counter on Malakir Cullblade.