Sanguine Syphoner

Whenever this creature attacks, each opponent loses 1 life and you gain 1 life.

Burglar Rat

When this creature enters, each opponent discards a card.

Merciless Resolve

As an additional cost to cast this spell, sacrifice a creature or land.
Draw two cards.

Dutiful Attendant

When this creature dies, return another target creature card from your graveyard to your hand.

Murder

Acolyte of Xathrid

Child of Night

Blood Glutton

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

Reckoner's Bargain

As an additional cost to cast this spell, sacrifice an artifact or creature.
You gain life equal to the sacrificed permanent's mana value. Draw two cards.

Weakness

Enchant creature
Enchanted creature gets -2/-1.

Bladebrand

Target creature gains deathtouch until end of turn.
Draw a card.

Swamp

Reassembling Skeleton

{1}{B}: Return this card from your graveyard to the battlefield tapped.

Giant Scorpion

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

Undercity Scavenger

When this creature enters, you may sacrifice another creature. If you do, put two +1/+1 counters on this creature, then scry 2.