Megrim

Whenever an opponent discards a card, this enchantment deals 2 damage to that player.

Mind Rot

Mind Shatter

Target player discards X cards at random.

Moonglove Winnower

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

Cancel

Mortivore

Mortivore's power and toughness are each equal to the number of creature cards in all graveyards.
{B}: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Ravenous Rats

When this creature enters, target opponent discards a card.

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.

Severed Legion

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

Terror

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Underworld Dreams

Whenever an opponent draws a card, this enchantment deals 1 damage to that player.

Unholy Strength

Enchant creature
Enchanted creature gets +2/+1.

Act of Treason

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and {T} this turn.)

Banefire

Banefire deals X damage to any target.
If X is 5 or more, this spell can't be countered and the damage can't be prevented.

Blaze

Cloud Sprite

Flying (This creature can't be blocked except by creatures with flying or reach.)
This creature can block only creatures with flying.

Duels of the Planeswalkers