Dark Ritual

Unholy Strength

Enchant creature
Enchanted creature gets +2/+1.

Drain Life

Spend only black mana on X.
Drain Life deals X damage to any target. You gain life equal to the damage dealt, but not more life than the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness.

Bog Imp

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

Terror

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

Hypnotic Specter

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

Bad Moon

Plague Rats

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

Order of the Ebon Hand

Protection from white
{B}: This creature gains first strike until end of turn.
{B}{B}: This creature gets +1/+0 until end of turn.

Underground Sea

Initiates of the Ebon Hand

{1}: Add {B}. If this ability has been activated four or more times this turn, sacrifice this creature at the beginning of the next end step.

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.

Black Knight

First strike (This creature deals combat damage before creatures without first strike.)
Protection from white (This creature can't be blocked, targeted, dealt damage, or enchanted by anything white.)