Grasping Scoundrel

This creature gets +1/+0 as long as it's attacking.

Demonic Vigor

Enchant creature
Enchanted creature gets +1/+1.
When enchanted creature dies, return that card to its owner's hand.

Prakhata Club Security

Essence Extraction

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

Gruesome Fate

Each opponent loses 1 life for each creature you control.

Gravedigger

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

Swamp

Dinosaur Hunter

Whenever this creature deals damage to a Dinosaur, destroy that creature.

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.

Raise Dead

Return target creature card from your graveyard to your hand.

Rat Colony

This creature gets +1/+0 for each other Rat you control.
A deck can have any number of cards named Rat Colony.

Dread Shade

{B}: This creature gets +1/+1 until end of turn.

Certain Death

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

Morbid Curiosity

As an additional cost to cast this spell, sacrifice an artifact or creature.
Draw cards equal to the mana value of the sacrificed permanent.

Torgaar, Famine Incarnate

As an additional cost to cast this spell, you may sacrifice any number of creatures. This spell costs {2} less to cast for each creature sacrificed this way.
When Torgaar enters, up to one target player's life total becomes half their starting life total, rounded down.

Tattered Mummy

When this creature dies, each opponent loses 2 life.

Ravenous Chupacabra

When this creature enters, destroy target creature an opponent controls.

Dusk Legion Zealot

When this creature enters, you draw a card and you lose 1 life.

Cursed Minotaur

Menace (This creature can't be blocked except by two or more creatures.)

Return

Aftermath (Cast this spell only from your graveyard. Then exile it.)
Exile target card from a graveyard. Create a 2/2 black Zombie creature token.

Never

Never // Return

Duress

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Bloodhunter Bat

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

Walk the Plank

Canal Monitor

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.

Moment of Craving

Target creature gets -2/-2 until end of turn. You gain 2 life.

Bloodcrazed Paladin

Flash
This creature enters with a +1/+1 counter on it for each creature that died this turn.