Greed

Howl from Beyond

Target creature gets +X/+0 until end of turn.

Hypnotic Specter

Flying
Whenever this creature deals damage to an opponent, that player discards a card at random.

Junún Efreet

Flying
At the beginning of your upkeep, sacrifice this creature unless you pay {B}{B}.

Lord of the Pit

Flying, trample
At the beginning of your upkeep, sacrifice a creature other than this creature. If you can't, this creature deals 7 damage to you.

Lost Soul

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Marsh Gas

All creatures get -2/-0 until end of turn.

Mind Twist

Target player discards X cards at random.

Murk Dwellers

Whenever this creature attacks and isn't blocked, it gets +2/+0 until end of combat.

Nether Shadow

Haste
At the beginning of your upkeep, if this card is in your graveyard with three or more creature cards above it, you may put this card onto the battlefield.

Circle of Protection: Blue

{1}: The next time a blue source of your choice would deal damage to you this turn, prevent that damage.

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.

Paralyze

Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
At the beginning of the upkeep of enchanted creature's controller, that player may pay {4}. If the player does, untap the creature.

Pestilence

At the beginning of the end step, if no creatures are on the battlefield, sacrifice this enchantment.
{B}: This enchantment deals 1 damage to each creature and each player.

Pit Scorpion

Poison Counter

Whenever this creature deals damage to a player, that player gets a poison counter. (A player with ten or more poison counters loses the game.)

Plague Rats

Plague Rats's power and toughness are each equal to the number of creatures named Plague Rats on the battlefield.

Fourth Edition