Tattered Mummy

When this creature dies, each opponent loses 2 life.

Alley Strangler

Swamp

Raise Dead

Return target creature card from your graveyard to your hand.

Essence Extraction

Essence Extraction deals 3 damage to target creature and you gain 3 life.

Sengir Vampire

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

Untamed Hunger

Enchant creature
Enchanted creature gets +2/+1 and has menace. (It can't be blocked except by two or more creatures.)

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.

Certain Death

Destroy target creature. Its controller loses 2 life and you gain 2 life.

Dune Beetle

Gravedigger

When this creature enters, you may return target creature card from your graveyard to your hand.

Bloodhunter Bat

Flying
When this creature enters, target player loses 2 life and you gain 2 life.