Swamp

Demon of Loathing

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

Typhoid Rats

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

Scathe Zombies

Sanitarium Skeleton

{2}{B}: Return Sanitarium Skeleton from your graveyard to your hand.

Cruel Cut

Destroy target creature with power 2 or less.

Murder

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.

Unlikely Aid

Target creature gets +2/+0 and gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

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.)

Vampire Opportunist

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

Krovikan Scoundrel

Mardu Outrider

As an additional cost to cast this spell, discard a card.

Compound Fracture

Target creature gets -1/-1 until end of turn. It gets an additional -1/-1 until end of turn for each card named Compound Fracture in your graveyard.

Raise Dead

Return target creature card from your graveyard to your hand.

Skeleton Archer

When Skeleton Archer enters, it deals 1 damage to any target.

Malakir Cullblade

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